Question about Sun Java Studio Standard 5 (SSJI9501TL9M) for PC, , Linux

3 Answers

Jawa void how i can solve the problem of java void (o) i m new in computer so pl solution should be simple

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  • Anonymous May 11, 2010

    I WANT TO KNOW THE QUESTION APPROPRIATELY?

  • Anonymous Mar 15, 2014

    // Victoria Andrews
    // Exercise 4.19
    import java.util.Scanner;



    public class SalesTest
    {

    static int count = 1;

    public static void main (String [] args) // main method
    {
    Scanner ST = new Scanner(System.in);

    int item; // number of item sold
    System.out.println(" We will now calculate weekly pay for employess!");

    System.out.printf( "Enter amount sold of item number %d (or -1 to QUIT):", count );
    item = ST.nextInt();// Enter number of item sold
    int sales = 0;
    count++;
    while( item != -1 && count!=5)
    {
    sales += getValue( item );
    System.out.printf( "Enter amount sold of item number %d (or -1 to QUIT):", count );
    item = ST.nextInt();// Enter number of item sold
    count++;
    }
    // Calculate pay
    double pay = (0.09 * sales) + 200.00 ;
    System.out.printf("The employees week pay is %.02f\n", pay);
    }
    // getValue method
    // Accepts an int (item) as an argument
    // Returns the corresponding value of the item
    public static double getValue( int i )
    {
    switch( i )
    {
    case 1:
    return 239.99;
    case 2:
    return 129.75;
    case 3:
    return 99.95;
    default:
    return 350.89;
    }
    }
    }

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  • 11 Answers

Void means your not returning any values in the method
public void add(int a,int b){
}
If method has return values which means your returning some values to the called of the method

public int add(int a,int b){
{
return a+b;
}

Posted on Jan 01, 2015

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  • 4 Answers

Try this code to see the difference between void() and none void
1) public void getString(){
System.out.print("This is outputed from within the function");
}
2public String getstring(){
String str="This is outputed at the end of the function";
return str;
}

Posted on Jan 22, 2009

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  • 35 Answers

You should not use arguments in void function in java ... in java pertaining to void the compiler doesn't understand the arguments and treats that as invalid... in c it is ok

Posted on Oct 02, 2008

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1 Answer

Code for a simple banking system.


//My name is rajeshwari and i have posted u a simple Bank program
import java.awt.*;
import java.awt.event.*;
public class MyBank implements ActionListener,ItemListener
{
Frame f1;
CheckboxGroup cg1;
Checkbox ch1,ch2,ch3,ch4,ch5,ch6;
Label l1,l2,l3,l4,l5;
TextField t1,t2,t3,t4;
Button b1,b2,b3;
Font ft;

MyBank()
{
f1 = new Frame("My Bank");
f1.setBounds(50,50,500,500);
f1.setLayout(null);

cg1 = new CheckboxGroup();
ch1 = new Checkbox("Short term[1yr]",cg1,false);
ch1.setBounds(50,50,120,30);
ch1.addItemListener(this);
ch2 = new Checkbox("Medium term[2yrs]",cg1,false);
ch2.setBounds(50,100,120,30);
ch2.addItemListener(this);
ch3 = new Checkbox("Long term[5yrs]",cg1,false);
ch3.setBounds(50,150,120,30);
ch3.addItemListener(this);
ch4 = new Checkbox("Very long term[10yrs]",cg1,false);
ch4.setBounds(50,200,120,30);
ch4.addItemListener(this);

l1 = new Label("Rate of Interest");
l1.setBounds(210,50,150,30);
t1 = new TextField();
t1.setBounds(360,50,100,30);
l2 = new Label("Deposit Amount");
l2.setBounds(210,125,150,30);
t2 = new TextField();
t2.setBounds(360,125,100,30);
l3 = new Label("Interest Amount");
l3.setBounds(210,200,150,30);
t3 = new TextField();
t3.setBounds(360,200,100,30);
l4 = new Label("Maturity Amount");
l4.setBounds(210,275,150,30);
t4 = new TextField();
t4.setBounds(360,275,100,30);

ch5 = new Checkbox("Senior Citizens");
ch5.setBounds(125,320,100,30);
ch5.addItemListener(this);
ch6 = new Checkbox("NRI");
ch6.setBounds(275,320,100,30);
ch6.addItemListener(this);

l5 = new Label("Extra : 0.5 Rate of Interest on Sr.Citizens and 1 Rate of Interest on NRI");
l5.setBounds(50,370,400,30);

b1 = new Button("Calc");
b1.setBounds(125,440,50,30);
b1.addActionListener(this);
b2 = new Button("Clear");
b2.setBounds(225,440,50,30);
b2.addActionListener(this);
b3 = new Button("Exit");
b3.setBounds(325,440,50,30);
b3.addActionListener(this);

f1.addWindowListener(new mywin());
ft=new Font("Arial",Font.ITALIC,20);
f1.add(ch1);
f1.add(ch2);
f1.add(ch3);
f1.add(ch4);
f1.add(l1);
f1.add(t1);
f1.add(l2);
f1.add(t2);
f1.add(l3);
f1.add(t3);
f1.add(l4);
f1.add(t4);
f1.add(ch5);
f1.add(ch6);
f1.add(l5);
f1.add(b1);
f1.add(b2);
f1.add(b3);
f1.setVisible(true);
}
public class mywin extends WindowAdapter
{
public void windowClosing(WindowEvent we)
{
System.exit(0);
}
}
public void itemStateChanged(ItemEvent ie)
{
double r;

try{
if(ch1.getState() == true)
{
t1.setText("3.5");
}
else if(ch2.getState() == true)
{
t1.setText("4");
}
else if(ch3.getState() == true)
{
t1.setText("4.5");
}
else if(ch4.getState() == true)
{
t1.setText("5");
}

if(ch5.getState() == true)
{
r = 0.5 + Double.parseDouble(t1.getText());
t1.setText(r+"");
}

if(ch6.getState() == true)
{
r = 1 + Double.parseDouble(t1.getText());
t1.setText(r+"");
}
}catch(Exception e){
System.out.println(e);
}
}

public void actionPerformed(ActionEvent ae)
{
double ri,damt,in,mamt;
if(ae.getSource() == b1)
{
ri = Double.parseDouble(t1.getText());
damt = Double.parseDouble(t2.getText());

in = (damt * ri) / 100;
mamt = damt + in;

t3.setText(in+"");
t4.setText(mamt+"");
}
else if(ae.getSource() == b2)
{
t1.setText("");
t2.setText("");
t3.setText("");
t4.setText("");
ch5.setState(false);
ch6.setState(false);
}
else if(ae.getSource() == b3)
{
System.exit(0);
}
}
public static void main(String args[])
{
MyBank obj = new MyBank();
}
}

Nov 13, 2010 | Sun Java Programming Language (cdj-275)

1 Answer

I need a complete workingsource code written in


This is a simple source code for Simple calculator in Java using RMI
//mathServer//
import java.rmi.*;
import java.rmi.Naming.*;
import java.rmi.server.*;
import java.rmi.registry.*;
import java.net.*;
import java.util.*;
interface mathInterface extends Remote
{
public int add(int a,int b) throws RemoteException;
public int subt(int a,int b) throws RemoteException;
public int mult(int a,int b) throws RemoteException;
public int div(int a,int b) throws RemoteException;
}
public class mathServer extends UnicastRemoteObject implements
mathInterface
{
public mathServer() throws RemoteException
{
System.out.println("Initializing Server");
}
public int add(int a,int b)
{
return(a+b);
}
public int subt(int a,int b)
{
return(a-b);
}
public int mult(int a,int b)
{
return(a*b);
}
public int div(int a,int b)
{
return(a/b);
}
public static void main(String args[])
{
try
{
mathServer ms=new mathServer();
java.rmi.Naming.rebind("MathServ",ms);
System.out.println("Server Ready");
}
catch(RemoteException RE)
{
System.out.println("Remote Server Error:"+ RE.getMessage());
System.exit(0);
}
catch(MalformedURLException ME)
{
System.out.println("Invalid URL!!");
}
}
}

//mathClient//
import java.rmi.*;
import java.rmi.registry.*;
import java.awt.*;
import java.awt.event.*;
public class mathClient extends Frame implements ActionListener
{
Button B1=new Button("Sum");
Button B2=new Button("Subtract");
Button B3=new Button("Multiply");
Button B4=new Button("Divide");
Label l1=new Label("Number 1");
Label l2=new Label("Number 2");
Label l3=new Label("Result");
TextField t1=new TextField(20);
TextField t2=new TextField(20);
TextField t3=new TextField(20);
public mathClient()
{
super("Calculator");
setLayout(null);
l1.setBounds(20,50,55,25);
add(l1);
l2.setBounds(20,100,55,25);
add(l2);
l3.setBounds(20,150,55,25);
add(l3);
t1.setBounds(150,50,100,25);
add(t1);
t2.setBounds(150,100,100,25);
add(t2);
t3.setBounds(150,150,100,25);
add(t3);
B1.setBounds(20,200,80,25);
add(B1);
B2.setBounds(100,200,80,25);
add(B2);
B3.setBounds(180,200,80,25);
add(B3);
B4.setBounds(260,200,80,25);
add(B4);
B1.addActionListener(this);
B2.addActionListener(this);
B3.addActionListener(this);
B4.addActionListener(this);
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent AE)
{
if(AE.getSource()==B1)
{
sum();
}
else if(AE.getSource()==B2)
{
subt();
}
else if(AE.getSource()==B3)
{
mult();
}
else if(AE.getSource()==B4)
{
div();
}
}
public void sum()
{
int i=Integer.parseInt(t1.getText());
int j=Integer.parseInt(t2.getText());
int val;
try
{
String ServerURL="MathServ";
mathInterface MI=(mathInterface)Naming.lookup(ServerURL);
val=MI.add(i,j);
t3.setText(""+val);
}
catch(Exception ex)
{
System.out.println("Exception:"+ex);
}
}
public void subt()
{
int i=Integer.parseInt(t1.getText());
int j=Integer.parseInt(t2.getText());
int val;
try
{
String ServerURL="MathServ";
mathInterface MI=(mathInterface)Naming.lookup(ServerURL);
val=MI.subt(i,j);
t3.setText(""+val);
}
catch(Exception ex)
{
System.out.println("Exception:"+ex);
}
}
public void mult()
{
int i=Integer.parseInt(t1.getText());
int j=Integer.parseInt(t2.getText());
int val;
try
{
String ServerURL="MathServ";
mathInterface MI=(mathInterface)Naming.lookup(ServerURL);
val=MI.mult(i,j);
t3.setText(""+val);
}
catch(Exception ex)
{
System.out.println("Exception:"+ex);
}
}
public void div()
{
int i=Integer.parseInt(t1.getText());
int j=Integer.parseInt(t2.getText());
int val;
try
{
String ServerURL="MathServ";
mathInterface MI=(mathInterface)Naming.lookup(ServerURL);
val=MI.div(i,j);
t3.setText(""+val);
}
catch(Exception ex)
{
System.out.println("Exception:"+ex);
}
}
public static void main(String args[])
{
mathClient MC=new mathClient();
MC.setVisible(true);
MC.setSize(600,500);
};
}

Jul 03, 2009 | Microsoft Computers & Internet

1 Answer

I want to read text file which is located in c drive using java code can anybody help me out


import java.io.*;
import java.util.Scanner;

public final class ReadWithScanner { public static void main(String... aArgs) throws FileNotFoundException {
ReadWithScanner parser = new ReadWithScanner("C:\\Temp\\test.txt");
parser.processLineByLine();
log("Done.");
}

/**
* @param aFileName full name of an existing, readable file.
*/

public ReadWithScanner(String aFileName){
fFile = new File(aFileName);
}

/** Template method that calls {@link #processLine(String)}. */
public final void processLineByLine() throws FileNotFoundException {
Scanner scanner = new Scanner(fFile);
try {
//first use a Scanner to get each line
while ( scanner.hasNextLine() ){
processLine( scanner.nextLine() );
}
}
finally {
//ensure the underlying stream is always closed
scanner.close();
}
}

/**
* Overridable method for processing lines in different ways.
*
* <P>This simple default implementation expects simple name-value pairs, separated by an
* '=' sign. Examples of valid input :
* <tt>height = 167cm</tt>
* <tt>mass = 65kg</tt>
* <tt>disposition = "grumpy"</tt>
* <tt>this is the name = this is the value</tt>
*/

protected void processLine(String aLine){
//use a second Scanner to parse the content of each line
Scanner scanner = new Scanner(aLine);
scanner.useDelimiter("=");
if ( scanner.hasNext() ){
String name = scanner.next();
String value = scanner.next();
log("Name is : " + quote(name.trim()) + ", and Value is : " + quote(value.trim()) );
}
else {
log("Empty or invalid line. Unable to process.");
}
//(no need for finally here, since String is source)
scanner.close();
}

// PRIVATE //
private final File fFile;

private static void log(Object aObject){
System.out.println(String.valueOf(aObject));
}

private String quote(String aText){
String QUOTE = "'";
return QUOTE + aText + QUOTE;
}
}

Jun 22, 2009 | Sun Java Programming Language (cdj-275)

1 Answer

Jnlp code for the java program


From command prompt: You can also launch an application from a command prompt by typing javaws jnlp_url where jnlp_url is a url to the jnlp file of the application. Go to Start > Run > type "cmd". A command prompt window will appear. Type "javaws url_of_jnlp"

May 28, 2009 | Microsoft Office Word 2007 Upgrade Version...

1 Answer

Error showing "java scrip void"


I have read and understood your problem, and the following links containt the infor regarding your query, visit these links to resolve your problem.

http://www.tech-faq.com/javascript-void-0.shtml
http://www.tech-faq.com/enable-javascript.shtml

Best regards.

May 26, 2009 | Microsoft Computers & Internet

1 Answer

Code for method parseInt() in java


parseInt(java.lang.String, int)

This code takes two arguments, a string constructor from the Java language and an integer. Its purpose is to parse (meaning de-construct or disassemble into component parts) one data type into another.

Here is an example of a Java program to specify and print out the dimensions of a rectangle, taken from the page http://www.roseindia.net/java/beginners/entervaluesfromkeyboard.shtml:

class Rectangle{
int length, breadth;
void show(int x, int y){
length = x;
breadth = y;
}
int calculate(){
return(length * breadth);
}
}
public class EnterValuesFromKeyboard{
public static void main(String[] args) {
Rectangle rectangle = new Rectangle();
int a = Integer.parseInt(args[0]);
int b = Integer.parseInt(args[1]);
rectangle.show(a, b);
System.out.println(" you have entered these values : " + a + " and " + b);
int area = rectangle.calculate();
System.out.println(" area of a rectange is : " + area);
}
}

Apr 09, 2009 | Sun Java Programming Language (cdj-275)

1 Answer

I am developing one java related application.In this there are three places place1,place2 ,place3 ,,if i'm click the place 1 ,in text box the text should come ilike ''place1 text.After that, when i click...


public class MainWindow extends javax.swing.JFrame {

public MainWindow() {
initComponents();
textField1.setText("");
}
.....component initialization function
......

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
textField1.setText("Place1");
}
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
textField1.setText("Place2");
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
textField1.setText("Place3");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainWindow().setVisible(true);
}
});
}

Mar 24, 2009 | Computers & Internet

1 Answer

Table creation via textfields using swings


import java.lang.Object;
import javax.swing.table.DefaultTableModel;


public class tabletest extends javax.swing.JFrame {
String[][] row = null;
String[] title=new String[3];
private int i;


/** Creates new form tabletest */
public tabletest() {
initComponents();
setTitle("table test");
setVisible(true);
System.out.print("NO Database Needed");
title[0]="Name";
title[1]="Desig";
title[2]="id";
}


/*
" In middle of this two source one generated code will be there that will be done by dragging ur fields to ur frame. THIS IS FOR netbeans IDE "
*/

private void b1ActionPerformed(java.awt.event.ActionEvent evt) {
row=new String[4][3];
// TODO add your handling code here:

String s1=t1.getText();
System.out.println(" event 1");
String s2=t2.getText();
System.out.println(" event 2");
int k=Integer.parseInt(t3.getText());
String s3=""+k;
System.out.println(" event 3");
try{
// for(int i=0;i<=2;i++)
row[i][0]=s1;
row[i][1]=s2;
row[i][2]=s3;
i++;

}catch(Exception e){
e.printStackTrace();

}
table.setModel(new DefaultTableModel(row,title));
}

private void b2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:

t1.setText("");
t2.setText("");
t3.setText("");

}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new tabletest().setVisible(true);
}
});
}

// Variables declaration - do not modify
private javax.swing.JButton b1;
private javax.swing.JButton b2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JPanel jPanel1;
private javax.swing.JLabel l1;
private javax.swing.JLabel l2;
private javax.swing.JLabel l3;
private javax.swing.JPanel p2;
private javax.swing.JScrollPane scp1;
private javax.swing.JTextField t1;
private javax.swing.JTextField t2;
private javax.swing.JTextField t3;
private javax.swing.JTable table;
// End of variables declaration

}

Mar 13, 2009 | Computers & Internet

1 Answer

About java swing..


Hi, if you have a specific query about java Swing, I can try to help you. Please find a small java code with using swing as example.

import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.JToolBar;
public class ToolbarDemo extends JFrame {
public static final String FontNames[] = { "Serif", "SansSerif", "Courier" };
protected Font fonts[];
protected JMenuItem[] fontMenus;
protected JToolBar toolBar;
public ToolbarDemo() {
super("Toolbars & actions");
setSize(450, 350);
JMenuBar menuBar = createMenuBar();
setJMenuBar(menuBar);
setVisible(true);
}
protected JMenuBar createMenuBar() {
final JMenuBar menuBar = new JMenuBar();
JMenu mFile = new JMenu("File");
ImageIcon iconNew = new ImageIcon("file_new.gif");
Action actionNew = new AbstractAction("New", iconNew) {
public void actionPerformed(ActionEvent e) {
System.out.println("new action");
}
};
JMenuItem item = mFile.add(actionNew);
mFile.add(item);
menuBar.add(mFile);
toolBar = new JToolBar();
JButton saveButton = new JButton("Save");
toolBar.add(saveButton);

getContentPane().add(toolBar, BorderLayout.NORTH);
return menuBar;
}
public static void main(String argv[]) {
new ToolbarDemo();
}
}
Thanks and Regards,
Supa.

Mar 10, 2009 | Microsoft Internet Explorer 7

2 Answers

StartActivity fails to launch class called


This example is working try it.

Forwarding.java
----------------------

package com.example.android.apis.graphics;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Forwarding extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.forwarding);
Button goButton = (Button)findViewById(R.id.go);
goButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
Intent intent = new Intent();
intent.setClass(Forwarding.this, ForwardTarget.class);
startActivity(intent);
finish();
} catch(Exception e) {
System.out.println(e.getMessage());
}
}
});
}
}


ForwardTarget
--------------------

package com.example.android.apis.graphics;
import android.app.Activity;
import android.os.Bundle;
public class ForwardTarget extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);

setContentView(R.layout.forward_target);
}
}



AndroidManifest.xml
-----------------------------

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.apis.graphics"
android:versionCode="1"
android:versionName="1.0.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Forwarding"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ForwardTarget"/>
</application>
</manifest>


forwarding.xml
---------------------

<?xml version="1.0" encoding="utf-8" ?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:padding="4dip"
android:gravity="center_horizontal" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="0"
android:paddingBottom="4dip" android:text="forwarding" />
<Button android:id="@+id/go" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="go">
<requestFocus />
</Button>
</LinearLayout>

forward_target.xml
---------------------------

<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:padding="4dip"
android:gravity="center_horizontal" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="0"
android:text="forward_target" />
</LinearLayout>


Nov 03, 2008 | Google Android

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