Java Programming Examples

Compile and Execute Java Online

java

public class HelloWorld{

    public class Pessoa 
    {
        private String nome;
        private String endereco;
        
        public String getNome (){
            return nome;
        }
        
        public void setNome (String nome)
        {
            this.nome = nome;    
        }
        
    }
    
    public class Fisica extends Pessoa
    {
    
    }
    
    public class Juridica extends Pessoa
    {
    
    }
    
    public static void main(String []args)
    {
        HelloWorld obj = new HelloWorld;
        // Fisica objetoPessoaF = new Fisica;
        // Juridica objetoPessoaJ = new Juridica;
        // System.out.println(objetoPessoaF.getNome());
    }
    
}

aaaaa

java

public class HelloWorld{

     public static void main(String []args){
        Thread t1=new Thread();
        Thread t2=new Thread();
        Thread t3=t1;
        System.out.println(t1==t3);
        System.out.println();
     }
}

profile3

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

Test

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

Compile and Execute Java Online

java

//reverse a string
import java.util.Scanner;
public class Hello
{
    public static void main(String args[])
    {
    String a;
    a=new String();
    Scanner in=new Scanner(System.in);
    System.out.println("Enter the string you want to reverse : ");
    a=in.nextLine();
    System.out.println("The entered string is : "+a);
    char temp;
    char y[]=a.toCharArray();
    for(int i=0;i<y.length/2;i++)
    {
        temp=y[i];
        y[i]=y[y.length-i-1];
        y[y.length-i-1]=temp;
    }
    for(int i=0;i<y.length;i++)
    System.out.print(y[i]);
    }
}

Compile and Execute Java Online

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

Compile and Execute Java Online

java

public class counter{

     public static void main(String []args){
        
        int counter = 2;
        while (counter<=100) {
        System.out.println("["+ counter + "] ");
        counter+=2;
        }
     }
}

HelloWorld

java

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
     }
}

gggg

java

import java.util.*;

public class HelloWorld{

     public static void main(String []args){
        System.out.println("Hello World");
         List<String> userNames = new ArrayList<>();
        userNames.add("Bhanu");
   	    userNames.add("Teja");
   	    userNames.add("Chandra");
   	    //userNames.add(new Integer(5));
   	    modify(userNames);
   	    System.out.println(userNames);
     }
     
     public static void modify(List names){
         names.add("Hello");
         names.add(new Integer(5));
         names.add(5);
         }
     
     
}

Saddle Points

java

public class saddlePoint
{
    public static void main(String[] args)
    {
       int a[][] = new int [3][3];
       a[0][0] = 1;
       a[0][1] = 2;
       a[0][2] = 3;
       a[1][0] = 2;
       a[1][1] = 3;
       a[1][2] = 4;
       a[2][0] = 3;
       a[2][1] = 4;
       a[2][2] = 5;
       
       for(int i = 0; i < a.length; i++)
       {
           int highestColIndex;
           highestColIndex = columnIndexWithMaxRowValue(a); 
           boolean isLowest = isMaxRowTheMinColumn(a,highestColIndex); 
           
           if (isLowest == true) 
           {
               System.out.println("Saddle point is at row " + i + " and column " + highestColIndex);
           }
           else
           {
               System.out.println("No Saddle point in row " + i);
           }
       }           
    }
    
    public static int columnIndexWithMaxRowValue(int [][] a)
    {
        int columnIndex = 0;
        int i = 0;
        int maxRow = a[i][0];  
           
           for(int j = 0; j < a.length; j++)
           {
               if(a[i][j] > maxRow)
               {
                   maxRow = a[i][j];
                   columnIndex = j;
               }
            }
        
        return columnIndex;    
    }
  
    
    public static boolean isMaxRowTheMinColumn(int [][] a, int columnIndex)
    {
        int minColumn = a[0][columnIndex];
        
        for(int k = 0; k < a.length; k++)
        {
            if(a[k][columnIndex] < minColumn)
            {
                minColumn = a[k][columnIndex];
                return false;
                
            }
        }
        
        return true;
    }
  
}

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