Row wise sorting in double dimensional using selection sort

Enter elements of matrix:
9
1
5
3
7
4
8
6
2
Original Matrix:
9 1 5
3 7 4
8 6 2
Matrix after sorting rows:
1 5 9
3 4 7
2 6 8

import java.io.*;
class MatrixSort{
    public static void main(String args[])
    throws IOException{
        InputStreamReader in = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(in);
        int a[][];
        int i = 0;
        int j = 0;
        int temp[];
        int k = 0;
        a = new int[3][3];
        temp = new int[3 * 3];
        System.out.println("Enter elements of matrix:");
        for(i = 0; i < 3; i++){
            for(j = 0; j < 3; j++){
                a[i][j] = Integer.parseInt(br.readLine());
                temp[k++] = a[i][j];
            }
        }
        System.out.println("Original Matrix:");
        for(i = 0; i < 3; i++){
            for(j = 0; j < 3; j++)
                System.out.print(a[i][j] + "\t");
            System.out.println();
        }
int z=0;
int min=0;
while(z<3*3)
{
for(int o=0;o<3*3;o=o+3)
{

        for(i = 0; i < 2; i++){
min=i+o;
            for(j = i+1; j < 3; j++)
{
                if(temp[j+o] < temp[min])
min=j+o;
}
int t = temp[i+o];
                    temp[i+o] = temp[min];
                    temp[min] = t;
                }
        k = 0;
        for(i = 0; i < 3; i++)
            for(j = 0; j < 3; j++)

                a[i][j] = temp[k++];}
z++;}
        System.out.println("Matrix after sorting rows:");
        for(i = 0; i < 3; i++){
            for(j = 0; j < 3; j++)
                System.out.print(a[i][j] + "\t");
            System.out.println();
        }
    }
}
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Boxing & Unboxing in Java

What is boxing and unboxing?
Wrapper classes are those whose objects wraps a primitive data type within them. In the java.lang package java provides a separate class for each of the primitive data type namely Byte, Character, Double, Integer, Float, Long, Short.
Converting primitive datatype to object is called boxing.

Example

Integer obj = new Integer ("9339");
Whereas, converting an object into corresponding primitive datatype is known as unboxing.

Example

public class Sample {
   public static void main (String args[]){
      Integer obj = new Integer("9339");
      int i = obj.intValue();
      System.out.println(i);
   }
}

Output

9339
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Pattern

public class Main
{
public static void main(String[] args)
{
String s="COMPUTER";
int l=s.length();
int k=l-1;
for(int i=0;i<l;i++)
{

for(int j=k;j<l;j++)
{
System.out.print(s.charAt(j));

}
System.out.println();k=k-1;
}
}
}
R
ER
TER
UTER
PUTER
MPUTER
OMPUTER
COMPUTER
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Arrange numbers in ascending order without using array sort method

import java.util.*;
public class Main
{
public static void main(String[] args)
{
Scanner sc=new Scanner(System.in);
System.out.println("enter a number");
int arr[]=new int[10];
int rep[]=new int[10];
int t=0;
for(int i=0;i<5;i++)
{
arr[i]=sc.nextInt();
}
int c=0;
for(int j=0;j<1000;j++)
{
for(int k=0;k<5;k++)
{
if(j==arr[k])
{
rep[t]=j;
t++;
}

}
}
System.out.println("sorted array");
for(int i=0;i<5;i++)
System.out.println(rep[i]+" ");
}
}
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Hand Cricket Game in Java 

import java.io.*;

public class Playing_Hand_Cricket_Against_Computer

{

    public static void main(String args[])throws IOException
    
    {
        
        InputStreamReader isr=new InputStreamReader(System.in);
        BufferedReader br=new BufferedReader(isr);
        
        String name; // to accept the player's name;
        int aa; // converting the random real number generated by 'rr' into a random whole number run for the computer;
        int ii; // used in for loops;
        int bb; // to accept the player's number;
        double rr; // to generate a random real number;
        int cheat; // to end the game if wrong input is entered; to keep a check whilst the game is running as to whether the game has ended or not;
        int score1; // to store the latest runs scored by the player;
        int score2; // to store the latest runs scored by the computer;
        int c; // used in for loops to create a specific design;
        int choice; // used to decide whether the game needs to be ended or restarted;
        int infinity=1; // used to keep the game running until the player decides to end the game;
        
        /* After referring to all the comments mentioned above,
         * you must be able to understand the working of this program as it is very easy.
         * 
         * Have fun!
         */
        
        while(infinity>0)
        {
            
            name=" ";
            aa=0;
            ii=0;
            bb=0;
            rr=0;
            cheat=0;
            score1=0;
            score2=0;
            c=0;
            choice=0;
            infinity=1;
            
            System.out.println("=======================");
            System.out.println("| WELCOME TO THE GAME |");
            System.out.println("=======================");
            System.out.println("");
            System.out.print("Enter Your Name: ");
            name=br.readLine();
            
                for(c=0;c<=2;c++)
                {
                    System.out.println("====================================");
                }
                
                System.out.println("Hello "+name+",");
                System.out.println(".");
                System.out.println("WELCOME TO THE CRICKET-MANIA");
                System.out.println(".");
                System.out.println("Instructions:");
                System.out.println(".");
                System.out.println("This Game Is Similar To The Hand-Cricket Game Played By Kids.");
                System.out.println(".");
                System.out.println("There Is No Limit On The Number Of Balls.");
                System.out.println(".");
                System.out.println("You Will First Bat. Enter Any Number From 1 To 10.");
                System.out.println(".");
                System.out.println("Enter The Numbers Carefully Without Making Any Mistake.");
                System.out.println(".");
                System.out.println("If The Number Entered By The Computer Is Same As The Number Entered By You,");
                System.out.println("You Will Be Declared As Out.");
                System.out.println(".");
                System.out.println("Your Final Score Will Be The Sum Of The Numbers You Entered Before Getting Out.");
                System.out.println(".");
                System.out.println("After Getting Out, You Will Have To Bowl.");
                System.out.println(".");
                System.out.println("Try To Enter A Number Similar To The Number Entered By The Computer.");
                System.out.println(".");
                System.out.println("If The Sum Of Numbers Entered By The Computer Becomes More Than Your Score, It Will Win.");
                System.out.println(".");
                System.out.println("But If You Enter A Number Same As The Number Entered By The Computer, You Can Win!");
                System.out.println(".");
                
                for(c=0;c<=2;c++)
                {
                    System.out.println("====================================");
                }
                
                System.out.println("YOU ARE BATTING:");
                
                for(c=0;c<=2;c++) { System.out.println("===================================="); } for(ii=1;ii>0;ii++)
                {
                    System.out.println("");
                    System.out.print("Enter Your Number: ");
                    bb=Integer.parseInt(br.readLine());
                    rr=((Math.random())*10);
                    rr=rr+1;
                    aa=(int)(rr);
                    System.out.println("");
                    System.out.println("Computer's Number: "+aa);
                    System.out.println("");
                    System.out.println("**********");
                    System.out.println("");

                    if(bb==aa)
                    {
                        System.out.println(" ");
                        System.out.println("HOWZATTT!!!!!!");
                        System.out.println(" ");
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println("YOUR FINAL SCORE = "+score1);
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println(" ");
                        break;
                    }
                    
                    else if(bb>0&&bb<=10) { score1=score1+bb; } else if(bb>10||bb<=0)
                    {
                        for(c=0;c<=2;c++)
                        {
                            System.out.println("====================================");
                        }
                        System.out.println("You have either tried to cheat or entered a wrong input. Game Over!");
                        cheat++;
                        break;
                    }

                    System.out.println("Your Current Score Is "+score1);
                    System.out.println("");
                    System.out.println("**********");
                }
                
                for(c=0;c<=2;c++) { if(cheat>0)
                    {
                        break;
                    }
                    System.out.println("====================================");
                }
                
                for(c=0;c<1;c++) { if(cheat>0)
                    {
                        break;
                    }
                    System.out.println("YOU ARE BOWLING:");
                }
                
                for(c=0;c<=2;c++) { if(cheat>0)
                    {
                        break;
                    }   
                    System.out.println("====================================");
                }
                
                for(ii=1;ii>0;ii++)
                {
                    if(cheat>0)
                    {
                        break;
                    }
                    
                    System.out.println("");
                    System.out.print("Enter Your Number: ");
                    bb=Integer.parseInt(br.readLine());
                    rr=((Math.random())*10);
                    rr=rr+1;
                    aa=(int)(rr);
                    System.out.println("");
                    System.out.println("Computer's Number: "+aa);
                    System.out.println("");
                    System.out.println("**********");
                    System.out.println("");
                    
                    if(aa==bb)
                    {
                        System.out.println(" ");
                        System.out.println("COMPUTER IS OUTT!!!!");
                        System.out.println(" ");
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println("COMPUTER'S FINAL SCORE = "+score2);
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println(" ");
                        break;
                    }
                    
                    else if(bb>0&&bb<=10) { score2=score2+aa; } else if(bb>10||bb<=0)
                    {
                        for(c=0;c<=2;c++) { System.out.println("===================================="); } System.out.println("You have either tried to cheat or entered a wrong input. Game Over!"); cheat++; break; } if(score2>score1)
                    {
                        System.out.println(" ");
                        System.out.println("THE COMPUTER HAS SCORED MORE THAN YOUU!!!");
                        System.out.println(" ");
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println("COMPUTER'S FINAL SCORE = "+score2);
                        System.out.println("################");
                        System.out.println("################");
                        System.out.println(" ");
                        break;
                    }
                    
                    System.out.println("Computer's Current Score Is "+score2);
                    System.out.println("");
                    System.out.println("**********");
                }
                
                for(c=0;c<=2;c++) { if(cheat>0)
                    {
                        break;
                    }
                    
                    System.out.println("====================================");
                }
                
                for(ii=0;ii<1;ii++) { if(cheat>0)
                    {
                        break;
                    }
                    
                    System.out.println(" ");
                    System.out.println("################");
                    System.out.println("################");
                    System.out.println("YOUR FINAL SCORE = "+score1);
                    System.out.println("COMPUTER'S FINAL SCORE = "+score2);
                    System.out.println("################");
                    System.out.println("################");
                    System.out.println(" ");

                    if((score1)>(score2))
                    {
                        System.out.println("Congratulations "+name+"!! You Have Defeated The Almighty, Computer!!");
                    }
                    
                    else if((score1)<(score2))
                    {
                        System.out.println("Sorry "+name+", But The Computer Has Defeated You..!");
                    }
                    
                    else
                    {
                        System.out.println("It's a Tie..! :(");
                    }
                    
                }
                
                for(c=0;c<=2;c++)
                {
                    System.out.println("====================================");
                }
            
            System.out.println("");
            System.out.println("Enter 1 To Play This Game Again.");
            System.out.println("");
            System.out.println("Enter 0 Or Any Other Number To Quit.");
            choice=Integer.parseInt(br.readLine());
            System.out.println("");
            
            if(choice==1)
            {
                System.out.print('\f');
            }
            
            else
            {
                System.out.print('\f');
                System.out.println("Good Bye!");
                break;
            }
            
        }
    }
}

// Program written by HRA
//

Output:

=======================
| WELCOME TO THE GAME |
=======================
Enter Your Name: Adarsh
====================================
====================================
====================================
Hello Adarsh,
.
WELCOME TO THE CRICKET-MANIA
.
Instructions:
.
This Game Is Similar To The Hand-Cricket Game Played By Kids.
.
There Is No Limit On The Number Of Balls.
.
You Will First Bat. Enter Any Number From 1 To 10.
.
Enter The Numbers Carefully Without Making Any Mistake.
.
If The Number Entered By The Computer Is Same As The Number Entered By You,
You Will Be Declared As Out.
.
Your Final Score Will Be The Sum Of The Numbers You Entered Before Getting Out.
.
After Getting Out, You Will Have To Bowl.
.
Try To Enter A Number Similar To The Number Entered By The Computer.
.
If The Sum Of Numbers Entered By The Computer Becomes More Than Your Score, It Will Win.
.
But If You Enter A Number Same As The Number Entered By The Computer, You Can Win!
.
====================================
====================================
====================================
YOU ARE BATTING:
====================================
====================================
====================================
Enter Your Number: 5
Computer’s Number: 9
**********
Your Current Score Is 5
**********
Enter Your Number: 5
Computer’s Number: 10
**********
Your Current Score Is 10
**********
Enter Your Number: 5
Computer’s Number: 7
**********
Your Current Score Is 15
**********
Enter Your Number: 5
Computer’s Number: 5
**********
HOWZATTT!!!!!!
################
################
YOUR FINAL SCORE = 15
################
################
====================================
====================================
====================================
YOU ARE BOWLING:
====================================
====================================
====================================
Enter Your Number: 5
Computer’s Number: 9
**********
Computer’s Current Score Is 9
**********
Enter Your Number: 10
Computer’s Number: 6
**********
Computer’s Current Score Is 15
**********
Enter Your Number: 5
Computer’s Number: 8
**********
THE COMPUTER HAS SCORED MORE THAN YOUU!!!
################
################
COMPUTER’S FINAL SCORE = 23
################
################
====================================
====================================
====================================
################
################
YOUR FINAL SCORE = 15
COMPUTER’S FINAL SCORE = 23
################
################
Sorry Adarsh, But The Computer Has Defeated You..!
====================================
====================================
====================================
Enter 1 To Play This Game Again.
Enter 0 Or Any Other Number To Quit.
0
Good Bye!
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