Java Programming Examples

Compile and Execute Java Online

java

import java.util.Scanner;
public class HelloWorld{
    public static void main(String[] args) {
        System.out.println("Input first number : ");
        Scanner in = new Scanner (System.in);
        int n1 = in.nextInt();
        
        System.out.println("Input second number : ");
        int n2 = in.nextInt();
        int sum = n1 + n2;
        System.out.println ("sum =" +n1+n2);
    }
}

468464416168168161681655+925+2+9

java

public class HelloWorld{

     public static void main(String []args){
         int age=20;
         String result=(age==50)?"isOk":"Gooooz";
        System.out.println("Hello World");
     }
}

Compile and Execute Java Online

java

public class HelloWorld{

     public static void main(String []args){
        int a = 3;
        int b = 4;
        int sum = 0;
        sum = a+b;
        
        
        System.out.println(a+"+"+b+"="+sum);
     }
}

using inline array in real code

java

public class HelloWorld{

     public static void main(String []args){
         HelloWorld o = new HelloWorld();
         o.printArray(new int[] {3,4,5,6,7});
        System.out.println("Done");
     }
     
     public void printArray(int[] arr) {
         for (int i : arr) {
             System.out.println(i);
         }
     }
}

gogogoletsgowegoatlastgoogle

java

public class HelloWorld{

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

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 HelloWorld{

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

Compile and Execute Java Online

java

class Papa{
    protected int x;
    Papa(){ x=40;}
    Papa(int y){x=y;}
}
class son extends Papa
{
    protected int x=0;
    son(){super(15);}
    son(int x){ }
         public static void main(String []args)
         {
                son s = new son();
                System.out.println(s.x+" ");
                Papa t =new son(2);
                System.out.println(t.x);
     }
}

elevator progrm in java code

java

import java.awt.geom.*;

public class elevator
{

    static int floor = 0, choice1, person = 0;

    public static void main(String args[])
    {

        floor = ((int) (Math.random() * 10 + 1));

        System.out.println("The elevator is now on floor " +floor);
        System.out.print("Which floor are you at now (0-10) where 0 = basement: ");
        choice1  =  Keyboard.readInt();

        if(floor == choice1)
        {
            System.out.println("Enter the elevator");
        }

        else if(floor > choice1)
        {
            ElevatorDown();
        }

        else if(floor < choice1)
        {
            ElevatorUp();
        }

        System.out.println("To which floor would you want to go (0-10) where 0 = basement");
        choice1 = Keyboard.readInt();

        if(floor > choice1)
        {
            ElevatorDown();
        }

        else if(floor < choice1)
        {
            ElevatorUp();
        }

    }

    public static void ElevatorUp()
    {
        System.out.println("The elevator is on it's way up...");

        for (person = choice1; choice1>=floor; floor++)

            System.out.println(floor);

        System.out.println("The elevator has arrived");
    }

    public static void ElevatorDown()
    {
        System.out.println("The elevator is on it's way down...");
        for (person = choice1; choice1<=floor; floor--)

            System.out.println(floor);

        System.out.println("The elevator has arrived");
    }
}

Compile and Execute Java Online

java

import java.sql.*;  
class OracleCon{  
public static void main(String args[]){  
try{  
//step1 load the driver class  
Class.forName("oracle.jdbc.driver.OracleDriver");  
  
//step2 create  the connection object  
Connection con=DriverManager.getConnection(  
"jdbc:oracle:thin:@localhost:1521:xe","system","oracle");  
  
//step3 create the statement object  
Statement stmt=con.createStatement();  
  
//step4 execute query  
ResultSet rs=stmt.executeQuery("select * from emp");  
while(rs.next())  
System.out.println(rs.getInt(1)+"  "+rs.getString(2)+"  "+rs.getString(3));  
  
//step5 close the connection object  
con.close();  
  
}catch(Exception e){ System.out.println(e);}  
  
}  
}

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