[Tony]

كتكوته هدي الأكواد للسؤال الأول والتالت بس مالقيت الوقت عشان افهمهم من هم الآختبارات ممكن احد من الأعضاء يساعدك بالنسبه للشرح...

السؤال الأول :

package javaapplication41;
import java.util.*;
public class Main {

   
    public static void main(String[] args) {



        Scanner input = new Scanner(System.in);
        System.out.print("Please enter string ");
        System.out.println();
        String st = input.nextLine();
       

        char[] third = st.toCharArray();
        for (int counter = 0; counter < third.length; counter++) {
            char ch = third[counter];
            int count = 0;
            for (int i = 0; i < third.length; i++) {
                if (ch == third[i])
                    count++;
            }
            boolean flag = false;
            for (int j=counter-1; j>=0; j--) {
                if (ch == third[j])
                    flag = true;
            }
            if (!flag) {
                if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o'
                        || ch == 'u' || ch == ' ') {
                    System.out.println("Character " + ch + " occurs " + count
                            + " times ");
                }
            }
        }
    }
}

السؤال التالت :

import java.util.*;

class MatrixAddition {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int[][] A = new int[3][3];
        int[][] B = new int[3][3];
        int[][] C = new int[3][3];
        System.out.println("Enter elements for matrix A : ");
        for (int i = 0; i < A.length; i++)
            for (int j = 0; j < A[i].length; j++) {
                A[i][j] = input.nextInt();
            }
        System.out.println("Enter elements for matrix B : ");
        for (int i = 0; i < B.length; i++)
            for (int j = 0; j < B[i].length; j++) {
                B[i][j] = input.nextInt();
            }
        System.out.println("Matrix A: ");
        for (int i = 0; i < A.length; i++) {
            System.out.println();
            for (int j = 0; j < A[i].length; j++) {
                System.out.print(A[i][j] + " ");
            }
        }
        System.out.println();
        System.out.println();
        System.out.println("Matrix B: ");
        for (int i = 0; i < B.length; i++) {
            System.out.println();
            for (int j = 0; j < B[i].length; j++) {
                System.out.print(B[i][j] + " ");
            }
        }
        System.out.println();
        System.out.println();
        System.out.println("Addition Of Matrices: ");
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                C[i][j] = A[i][j] + B[i][j];
                System.out.print(C[i][j] + " ");
            }
            System.out.println();
        }
    }
}

بالتوفيــق ~