Categories: ArrayjavaJava ProgramLearn java

Two Dimensional Array in Java language

Table of Contents

Toggle

Two Dimensional Array in Java

In this tutorial, we will discuss the Two Dimensional Array in Java language.

In this post, we will learn how to define the two-dimensional array and how to use it

To understand the two-dimensional array, we can be defined as the appropriate words as an array of array

Two Dimensional Array

Declaration of two-dimensional array

Syntex

Two dim arrays can declare the following methods

dataType[][] arrayname; —— 1 or

dataType [][]arrayname; ——- 2 or

dataType arrayname [][]; —— 3 or

dataType []arrayname[]; —— 4

you can choose any one method

Example for Two dim array declaration

int [][] array;

Syntax

Creation of two-dimensional array

Syntax

datatype[row count][coloum count] arrayname=new datatype;

Example of Creation of Twodimensional array

array=new int[5][5]; //5 row and 5 coloum

Declaration

The default value of array

Find the default value of the two-dimensional array after declaring a two-dimensional array

class ArrayWithForTwoDimdefault{
public static void main (String args[]){
int arr[][]=new int[4][3];//array declaration

System.out.print("\ndisplay cell value in an array: \n");
for(int i=0; i<4; i++){
   for(int j=0; j<3; j++){
      System.out.print("\ndisplay Element index["+i+"]["+j+"]:"+arr[i][j] );
}
}
}
}

When the above code is executed it produces the following result

Default value

initiation of Two dimm array

1.Standered metod

array[0][0]=66;

array[0][1]=54;

array[0][2]=36;

array[0][3]=59;

array[0][4]=50;

array[1][0]=55;

array[1][1]=59;

array1][2]=54;

array[1][3]=59;

array[1][4]=96;

Examples 1

class arr{
public static void main(String args[]){
 int[][] x;
 x=new int[6][2];
 x[0][0]=34;
 x[0][1]=56;
 x[1][0]=77;
 x[1][1]=73;
 x[2][0]=14;
 x[2][1]=15;
 x[3][0]=16;
 x[3][1]=07;
 x[4][0]=18;
 x[4][1]=19;
 x[5][0]=25;
 x[5][1]=26;


System.out.println(x[0][0]);
System.out.println(x[0][1]);
System.out.println(x[1][0]);
System.out.println(x[1][1]);
System.out.println(x[2][0]);
System.out.println(x[2][1]);


}
 }

When the above code is executed it produces the following result

Example

Examples 2

class Arraylast{

public static void main(String args[]){
int[][] x;
x=new int[6][2];
x[0][0]=10;
x[0][1]=11;
x[1][0]=12;
x[1][1]=13;
x[2][0]=14;
x[2][1]=15;
x[3][0]=16;
x[3][1]=17;
x[4][0]=18;
x[4][1]=19;
x[5][0]=20;
x[5][1]=21;

for(int i=0;i<=5;i++)
{
for (int j=0;j<=1;j++)
{

System.out.println(x[i][j]);
}
}
}

When the above code is executed it produces the following result

Example

Initialize during the declaration

int[][] arr={

{45,76,98,65},

{36,78,76,55},

{56,66,56,24},

};

Example

class ArrayTwoDim{
public static void main(String args[]){
int[][] arr={
{45,76,98,65},
{36,78,76,55},
{56,66,48,24},
};

//first row of elements
System.out.println(arr[0][0]);
System.out.println(arr[0][1]);
System.out.println(arr[0][2]);
System.out.println(arr[0][3]);
System.out.println();
//second row of elements
System.out.println(arr[1][0]);
System.out.println(arr[1][1]);
System.out.println(arr[1][2]);
System.out.println(arr[1][3]);
System.out.println();
//third row of elements
System.out.println(arr[2][0]);
System.out.println(arr[2][1]);
System.out.println(arr[2][2]);
System.out.println(arr[2][3]);

}
}

When the above code executed it produces the following output

Example

Initialize and display elements to the array using loops

Using the for loop

import java.util.Scanner;
class ArrayWithForTwoDim{
public static void main (String args[]){
Scanner scan=new Scanner(System.in);
System.out.print("Enter the row length for an array: ");
int row=scan.nextInt();
System.out.print("Enter the coloum length for an array: ");
int column=scan.nextInt();
int arr[][]=new int[row][column];//array declaration
System.out.print("\nEnter "+row*column+" Element to two dim array: \n");
for(int i=0; i<row; i++){
   for(int j=0; j<column; j++){
      arr[i][j]=scan.nextInt();
}
}
System.out.print("\ndisplay Element in an array: \n");
for(int i=0; i<row; i++){
   for(int j=0; j<column; j++){
      System.out.print("\ndisplay Element Row["+i+"]:column["+j+"]:"+arr[i][j] );
}
}
}
}

When the above code executed it produces the following output

Example

Using the while loop

import java.util.Scanner;
class ArrayWithWhileTwoDim{
public static void main (String args[]){
Scanner scan=new Scanner(System.in);
System.out.print("Enter the row length for an array: ");
int row=scan.nextInt();
System.out.print("Enter the coloum length for an array: ");
int column=scan.nextInt();
int arr[][]=new int[row][column];//array declaration
System.out.print("\nEnter "+row*column+" Element to two dim array: \n");
int i=0;
while( i<row){
  int j=0;
   while( j<column){
      arr[i][j]=scan.nextInt();
    j++;
}
i++;
}
System.out.print("\ndisplay Element in an array: \n");
i=0;
while( i<row){
  int j=0;
   while( j<column){
      System.out.print("\ndisplay Element Row["+i+"]:column["+j+"]:"+arr[i][j] );
    j++;
}
i++;
}
}
}

When the above code executed it produces the following output

Example

Using the do-while loop

import java.util.Scanner;
class ArrayWithDoWhileTwoDim{
public static void main (String args[]){
Scanner scan=new Scanner(System.in);
System.out.print("Enter the row length for an array: ");
int row=scan.nextInt();
System.out.print("Enter the coloum length for an array: ");
int column=scan.nextInt();
int arr[][]=new int[row][column];//array declaration
System.out.print("\nEnter "+row*column+" Element to two dim array: \n");
int i=0;
do{
  int j=0;
   do{
      arr[i][j]=scan.nextInt();
    j++;
}while( j<column);
i++;
}while( i<row);
System.out.print("\ndisplay Element in an array: \n\n");
i=0;
do{
  int j=0;
   System.out.print("\nrow "+(i+1)+" elements");
   
   do{
    
      System.out.print("\ndisplay Element Row["+i+"]:column["+j+"]:"+arr[i][j] );
    
    j++;
}while( j<column);
i++;
System.out.print("\n");
}while( i<row);
}
}

When the above code executed it produces the following output

Display output using for each loop in two dimension array

class arrayforeach{

public static void main (String args[]){

int[]array[]=new int[3][3];

array[0][0]=87;

array[0][1]=67;

array[0][2]=07;

array[1][0]=83;

array[1][1]=88;

array[1][2]=81;

array[2][0]=67;