1. One-Dimensional Array practice program-1
This program stores elements in an array and displays them. It uses a for loop to access and print each array element.
import java.util.Scanner;
public class PrintArray {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter the size of array: ");
int n = sc.nextInt();
int[] arr = new int[n];
System.out.println("Enter array elements:");
for (int i = 0; i < n; i++) {
arr[i] = sc.nextInt();
}
System.out.println("Array Elements:");
for (int i = 0; i < n; i++) {
System.out.print(arr[i] + " ");
}
sc.close();
}
}Input and Output:
Enter the size of array: 5
Enter array elements:
10
20
30
40
50
Array Elements:
10 20 30 40 50 Code language: PHP (php)2. One-Dimensional Array practice program-2
This program calculates the sum of all elements in an array. It traverses the array and adds each element to a sum variable.
import java.util.Scanner;
public class SumArray {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter array size: ");
int n = sc.nextInt();
int[] arr = new int[n];
int sum = 0;
System.out.println("Enter elements:");
for (int i = 0; i < n; i++) {
arr[i] = sc.nextInt();
sum += arr[i];
}
System.out.println("Sum = " + sum);
sc.close();
}
}Input and Output:
Enter array size: 4
Enter elements:
5
10
15
20
Sum = 50Code language: PHP (php)3. One-Dimensional Array practice program-3
This program finds the largest element in an array. It compares every element with the current largest value.
import java.util.Scanner;
public class LargestArray {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter array size: ");
int n = sc.nextInt();
int[] arr = new int[n];
System.out.println("Enter elements:");
for (int i = 0; i < n; i++)
arr[i] = sc.nextInt();
int largest = arr[0];
for (int i = 1; i < n; i++) {
if (arr[i] > largest)
largest = arr[i];
}
System.out.println("Largest Element = " + largest);
sc.close();
}
}Input and Output:
Enter array size: 4
Enter elements:
10
50
30
20
Largest Element = 50Code language: PHP (php)4. One-Dimensional Array practice program-4
This program searches for an element in an array. It displays whether the entered element is found or not.
import java.util.Scanner;
public class SearchArray {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int[] arr = {10,20,30,40,50};
System.out.print("Enter element to search: ");
int key = sc.nextInt();
boolean found = false;
for(int num : arr){
if(num == key){
found = true;
break;
}
}
if(found)
System.out.println("Element Found");
else
System.out.println("Element Not Found");
sc.close();
}
}Input and Output:
Enter element to search: 20
Element Found5. Two-Dimensional Array practice program-1
This program adds two matrices of the same size. Each corresponding element is added and stored in the result matrix.
import java.util.Scanner;
public class MatrixAddition {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int[][] A = new int[2][2];
int[][] B = new int[2][2];
int[][] C = new int[2][2];
System.out.println("Enter First Matrix:");
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
A[i][j]=sc.nextInt();
System.out.println("Enter Second Matrix:");
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
B[i][j]=sc.nextInt();
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
C[i][j]=A[i][j]+B[i][j];
System.out.println("Result Matrix:");
for(int i=0;i<2;i++){
for(int j=0;j<2;j++)
System.out.print(C[i][j]+" ");
System.out.println();
}
sc.close();
}
}Input and Output:
Enter First Matrix:
1 2
3 4
Enter Second Matrix:
5 6
7 8
Result Matrix:
6 8
10 12 6. Two-Dimensional Array practice program-2
This program subtracts one matrix from another. Each corresponding element is subtracted to produce the result matrix.
import java.util.Scanner;
public class MatrixSubtraction {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int[][] A={{8,7},{6,5}};
int[][] B={{4,3},{2,1}};
System.out.println("Result Matrix:");
for(int i=0;i<2;i++){
for(int j=0;j<2;j++){
System.out.print((A[i][j]-B[i][j])+" ");
}
System.out.println();
}
sc.close();
}
}Output:
Result Matrix:
4 4
4 4 7. Two-Dimensional Array practice program-3
This program multiplies two matrices. It uses three nested loops to compute the matrix product.
import java.util.Scanner;
public class MatrixMultiplication {
public static void main(String[] args) {
int[][] A={{1,2},{3,4}};
int[][] B={{5,6},{7,8}};
int[][] C=new int[2][2];
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
for(int k=0;k<2;k++)
C[i][j]+=A[i][k]*B[k][j];
System.out.println("Product Matrix:");
for(int i=0;i<2;i++){
for(int j=0;j<2;j++)
System.out.print(C[i][j]+" ");
System.out.println();
}
}
}Output:
Product Matrix:
19 22
43 50 8. Two-Dimensional Array practice program-4
This program finds the transpose of a matrix. Rows become columns and columns become rows.
public class MatrixTranspose {
public static void main(String[] args) {
int[][] A={{1,2,3},{4,5,6}};
System.out.println("Transpose:");
for(int i=0;i<3;i++){
for(int j=0;j<2;j++){
System.out.print(A[j][i]+" ");
}
System.out.println();
}
}
}Output:
Transpose:
1 4
2 5
3 6 9. Two-Dimensional Array practice program-5
This program calculates the sum of all elements in a matrix. It traverses every row and column using nested loops.
public class MatrixSum {
public static void main(String[] args) {
int[][] matrix={{1,2},{3,4}};
int sum=0;
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
sum+=matrix[i][j];
System.out.println("Sum = "+sum);
}
}Output:
Sum = 1010. Two-Dimensional Array practice program-6
This program finds the largest element in a matrix. It compares every element with the current maximum value.
public class LargestMatrix {
public static void main(String[] args) {
int[][] matrix={{10,35},{45,22}};
int largest=matrix[0][0];
for(int i=0;i<2;i++)
for(int j=0;j<2;j++)
if(matrix[i][j]>largest)
largest=matrix[i][j];
System.out.println("Largest Element = "+largest);
}
}Output:
Largest Element = 45