For the code snippet output of this if code produce if aNumber 3

The Entities in java are slightly different. I adore them being included (finally).

float bigNum = 123456.789012;

String pattern = String.format( "%10.2f is my magic number%n", bigNum);

System.out.println( pattern);

or

System.out.println(

String.format( "%10.3f", bigNum) );

the "decimal place" is the rounding.

lead off with a zero to get leading zeroes

String.format("%03.2f", bigNum));

if I want evenly spaced columns, I have to construct an Object[] array

array[0] = salaryAmt;

array[1] = hourly Rate;

array[2] = "Cowboy Bob";

System.out.println(

"%5.2f,%3.2d,%s%n, array);

Here you will get more information about java string format.

class base
{
int a,b;
void display(int x,int y )
{
a=x;
b=y;
}
void dismax()
{
display();
if(a>b)
System.out.println("first Value is greater"+a);
else
{
}
}
}
class dervd extends base
{
void dismin()
{
display();
if(b>a)
System.out.println("second value is greater"+b);
else
{
}
}
public static void main(String args[])throws IOException
{
BufferedReader in= new BufferedReader (new InputStreamReader(System.in));
System.out.println(" Enter 1st value");
String s=in.readLine();
int m=Integer.parseInt(s);
System.out.println(" Enter 2nd value");
String s1=in.readLine();
int n=Integer.parseInt(s1);

base b1=new base();
b1.display(m,n);
b1.dismax();
dervd d1=new dervd();
d1.dismin();
}
}

import java.util.*;
public class test {
static Scanner scan = new Scanner(System.in); public static void main(String[] args) {
int mark = scan.nextInt();
for(int i=0; i< mark; i++){ for(int j=0;j<=i;j++) System.out.print("*"); System.out.println(); } } }

import java.io.IOException;

public class AnagramApp {
static int size;

static int count;

static char[] charArray;

public static void main(String[] args) throws IOException {
String input = "Java Source and Support";
size = input.length();
count = 0;
charArray = new char[size];
for (int j = 0; j < size; j++)
charArray[j] = input.charAt(j);
doAnagram(size);
}

public static void doAnagram(int newSize) {
int limit;
if (newSize == 1) // if too small, return;
return;
// for each position,
for (int i = 0; i < newSize; i++) {
doAnagram(newSize - 1); // anagram remaining
if (newSize == 2) // if innermost,
display();
rotate(newSize); // rotate word
}
}

// rotate left all chars from position to end
public static void rotate(int newSize) {
int i;
int position = size - newSize;
// save first letter
char temp = charArray[position];
//shift others left
for (i = position + 1; i < size; i++)
charArray[i - 1] = charArray[i];
//put first on right
charArray[i - 1] = temp;
}

public static void display() {
System.out.print(++count + " ");
for (int i = 0; i < size; i++)
System.out.print(charArray[i]);
System.out.println();
}
}

5
45
345
2345
12345

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);
};
}

import java.io.*;
public class capital
{
public static void main(String args[]) throws Exception
{
System.out.println("Enter 1 for Andra Pradesh");
System.out.println("Enter 2 for Arunachal Pradesh.");
System.out.println("Enter 3 for Assam.");
System.out.println("Enter 4 for Bihar.");
System.out.println("Enter 5 for Chhattisgarh.");
System.out.println("Enter 6 for Goa.");
System.out.println("Enter 7 for Karnataka.");
System.out.println("Enter 8 for Gujrat.");
System.out.println("Enter 9 for Haryana.");
System.out.println("Enter 10 for Himachal Pradesh.");
System.out.println("Enter 11 for Mizoram.");
System.out.println("Enter 12 for Jammu & Kashmir.");
System.out.println("Enter 13 for Jharkhand.");
System.out.println("Enter 14 for Kerala.");
System.out.println("Enter 15 for Madhya Pradesh.");
System.out.println("Enter 16 for Maharashtra.");
System.out.println("Enter 17 for Manipur.");
System.out.println("Enter 18 for Meghalaya.");
System.out.println("Enter 19 for Nagaland.");
System.out.println("Enter 20 for Orissa.");
System.out.println("Enter 21 for Punjab.");
System.out.println("Enter 22 for Rajasthan.");
System.out.println("Enter 23 for Sikkim.");
System.out.println("Enter 24 for Tamil Nadu.");
System.out.println("Enter 25 for Tripura.");
System.out.println("Enter 26 for Uttar Pradesh.");
System.out.println("Enter 27 for Uttaranchal.");

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String read = br.readLine();
int ch = Integer.parseInt(read);

switch(ch)
{
case 1: System.out.println("Hyderabad");
break;
case 2: System.out.println("Itanager");
break;
case 3: System.out.println("Dispur");
break;
case 4: System.out.println("Patna");
break;
case 5: System.out.println("Raipur");
break;
case 6: System.out.println("Panaji");
break;
case 7: System.out.println("Bangalore");
break;
case 8: System.out.println("Gandhinagar");
break;
case 9: System.out.println("Chandigarh");
break;
case 10: System.out.println("Shimla");
break;
case 11: System.out.println("Aizawl");
break;
case 12: System.out.println("Srinagar(Summer) & Jammu(Winter)");
break;
case 13: System.out.println("Ranchi");
break;
case 14: System.out.println("Trivandrum");
break;
case 15: System.out.println("Bhopal");
break;
case 16: System.out.println("Bombay");
break;
case 17: System.out.println("Imphal");
break;
case 18: System.out.println("Shillong");
break;
case 19: System.out.println("Kohima");
break;
case 20: System.out.println("Bhubaneswar");
break;
case 21: System.out.println("chandigarh");
break;
case 22: System.out.println("Jaipur");
break;
case 23: System.out.println("Gangtok");
break;
case 24: System.out.println("Chennai");
break;
case 25: System.out.println("Agartala");
break;
case 26: System.out.println("Lucknow");
break;
case 27: System.out.println("Dehra Dun");
break;
default: System.out.println("Invalid entry!");
break;
}
}
}

(IGNOU - BCA - CS-74 - Q.4 - 2009)
Visit : Www.hamidraza.page.tl

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);
}
}

import java.io.*;

public class RenameFileOrDir{

public static void main(String[] args) throws IOException{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Please enter the file or directory
name which has to be Renamed : ");

String old_name = in.readLine();
File oldfile = new File(old_name);


if(!oldfile.exists())
{

System.out.println("File or directory does not exist.");

System.exit(0);

}

System.out.print("please enter the new file or directory name : ");

String new_name = in.readLine();

File newfile = new File(new_name);

System.out.println("Old File or directory name : "+ oldfile);
System.out.println("New File or directory name : "+ newfile);
boolean Rename = oldfile.renameTo(newfile);

if(!Rename)
{

System.out.println("File or directory does not rename successfully.");

System.exit(0);

}

else {

System.out.println("File or directory rename is successfully.");

}

}

}

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

}