Java program to take 2D array as input from user.

TwoDArrayInput.java

import java.util.Scanner;

public class TwoDArrayInput{
    
    public static void main(String args[]){
        
       System.out.print("Enter 2D array size : ");
       Scanner sc=new Scanner(System.in);
       int rows=sc.nextInt();
       int columns=sc.nextInt();
       
       System.out.println("Enter array elements : ");    
        
       int twoD[][]=new int[rows][columns];
        
          
        for(int i=0; i<rows;i++)
         {            
            for(int j=0; j<columns;j++)
            {
                twoD[i][j]=sc.nextInt();
            }
         }
        System.out.print("\nData you entered : \n");
        for(int []x:twoD){
            for(int y:x){
            System.out.print(y+"        ");
            }
            System.out.println();
        }
        
    }  
    
}

package newd;
import java.util.Scanner;

public class rough {

public static void main(String[] args){
	
	System.out.println("Enter rows in table: ");
    Scanner input = new Scanner(System.in); 
    
    int x = input.nextInt();
	
	System.out.println("Enter col in table: ");
    
	int y = input.nextInt();
	
	int array[][]= new int[x][y];
    

    System.out.println("Enter array: ");
    
    
    for(int row=0; row<x ;row++){
    for(int col = 0; col<y ; col++) {
    	
    	array[x][y]=input.nextInt();
    	
    }
    }
    
    System.out.println("Array is : ");

    for(int row=0; row<x ;row++){
        for(int col = 0; col<y ; col++) {
        	
        	System.out.println(array[x][y] + "\t");
        	
        }
    	System.out.println();
        
        }
        
    
    
}

}

THIS CODE IS SAME AS YOURS BUT IS GIVING EXCEPTION : Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
at newd.rough.main(rough.java:26)
can you tell me why ?

AnubhavMukhija write also do this but I also got same problem

great

Nice.

package newd;
import java.util.Scanner;

public class rough {

public static void main(String[] args){
	
	System.out.println("Enter rows in table: ");
    Scanner input = new Scanner(System.in); 
    
    int x = input.nextInt();
	
	System.out.println("Enter col in table: ");
    
	int y = input.nextInt();
	
	int array[][]= new int[x][y];
    

    System.out.println("Enter array: ");
    
    
    for(int row=0; row<x ;row++){
    for(int col = 0; col<y ; col++) {
    	
    	array[x][y]=input.nextInt();
    	
    }
    }
    
    System.out.println("Array is : ");

    for(int row=0; row<x ;row++){
        for(int col = 0; col<y ; col++) {
        	
        	System.out.println(array[x][y] + "\t");
        	
        }
    	System.out.println();
        
        }
        
    
    
}

}

THIS CODE IS SAME AS YOURS BUT IS GIVING EXCEPTION : Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2 at newd.rough.main(rough.java:26) can you tell me why ?

You need to iterate and keep the index as rows and columns as you are iterating over them, not the input you take from the user (ie. x & y). Those are just the threshold values until when the rows and columns variable would run up to.

//old
array[x][y]=input.nextInt();
//new
array[row][col]=input.nextInt();

//old
System.out.println(array[x][y] + "\t");
//new
System.out.println(array[row][col] + "\t");

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 2 out of bounds for length 2
at df.array_sum.main(array_sum.java:26) i am getting this error

how can use this for giving char

thank you

cool

/*

• To change this license header, choose License Headers in Project Properties.
• To change this template file, choose Tools | Templates
• and open the template in the editor.
  */
  package com.mycompany.mavenproject3;

import java.util.Scanner;
import java.util.Arrays;

/**
*

• @author mimoe
  */
  public class Exercise {

System.out.println(" Enter number of Rows");
int row=s.nextInt();
System.out.println(" Enter number of col");
int col=s.nextInt();
int arr[][]=new int [row][col];
System.out.println(" Enter Elements of Array");
for ( row = 0; row < arr.length; row++) {
for ( col = 0; col < arr[row].length; col++) {

         arr[row][col]=s.nextInt();
     }
 }
 for ( row = 0; row < arr.length; row++) {
     for (col = 0; col < arr[row].length; col++) {
         System.out.print(arr[row][col]+" ");
         
     }
     System.out.println();
 }

}
}

import java.io.*;
import java.util.Arrays;
//package assignments.ass23;
import java.util.Scanner;

/**

• 2darray
  */
  public class darray {
  public static void getArray(int n,int[][] array) {
  Scanner sc = new Scanner(System.in);
  array = new int[n][n];
  System.out.println("Enter the elements :");
  for(int i= 0;i<n;i++){
  for(int j = 0;j<n;j++){
  array[i][j] = sc.nextInt();
  }

   }
  

  }
  public static void displayArray(int n,int[][] array) {

   System.out.println("the elements are :");
   for(int i= 0;i<n;i++){
       for(int j = 0;j<n;j++){
           System.out.println("\t"+array[i][j]);
       }
       System.out.println("\n");
   }
  

  }
  public static void main(String[] args) {
  int n;
  int[][] array;
  Scanner sc = new Scanner(System.in);
  System.out.println("Enter the limit");
  n = sc.nextInt();
  array = new int[n][n];
  getArray(n, array);
  displayArray(n, array);
  }
  }

please let me know where I went wrong.

import java.util.Scanner;
public class Multidimensional_Arrays {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int flates[][] = new int[2][3];
System.out.println("Enter array elements = ");
for (int i = 0; i < flates.length; i++) {
for (int j = 0; j <= flates.length; j++) {
flates[i][j] = sc.nextInt();
System.out.print(flates[i][j] + " ");
}
}
System.out.println();
//reverse
System.out.println("Reverse of Multi-dimensional Array");
for (int i = flates.length - 1; i >= 0; i--) {
for (int j = flates.length; j >= 0; j--) {
System.out.print(flates[i][j] + " ");
}
}
}
}

Bro your "x" and "y" are the size of row and column, so in the line
// Let's consider your row =2, and column=2
array[x][y] = input.nextInt();
array[2][2] = 20 // let's consider ur 1st input is 20.
You are directly giving input to, the 2nd row 2nd column element.
So for the first input i.e., array[2][2] will take input as 20. In the next iteration, again you are giving the input for the same array[2][2]th element.
There you will get the ArrayIndexOutOfRange
After