Sunday revision java

 package com.company;

class employee10{
    int salary;
    public employee10(){
        System.out.println("I am default constructor");
    }
    public int employee10(int salary){
        this.salary=salary;
        return salary;
    }
}
class sunday{
    int a=0;
    String s="rohan";

    public int getA() {
        return a;
    }
    public void setA(int a) {
        this.a = a;
    }
    public String getS() {
        return s;
    }
    public void setS(String s) {
        this.s = s;
    }
}
class factorial {
    public static int meth(int n) {
        if (n == 0 || n == 1) {
            return 1;
        }
        else {
            return n*meth(n-1);
        }
    }
}
public class CWR_SundayRevision {
    public static void main(String[] args) {
        char[] ch = {'=', 'r', '3', '@', 'E', '+'};
//        Sweeping an array
        char v=0;
        int g= Math.floorDiv(ch.length,2);
        for(int i=0;i<g;i++){
            v=ch[i];
            ch[i]=ch[ch.length-i-1];
            ch[ch.length-i-1]=v;
        }
        for (char e:ch
             ) {
            System.out.println(e);

        }
//        Printing an array in reverse order
//        for(int i=ch.length-1;i>=0;i--){
//            System.out.println(ch[i]);
//    }
//            int [] [] [] points= new int[20][5][2];
//            System.out.println(points.length);

//            Adding two array
//        int[] marks1={4,5,6,8,9,6,8,10,5,1};
//        int[] marks2={2,4,7,2,3,0,7,1,5,1};
//        for(int i=0;i<marks1.length;i++){
//            int c= marks1[i]*marks2[i];
//            System.out.print(c+" ");

//            Multi dimensional
//            int[][] m1= new int[2][3];
//            m1[0][0]=2;
//            m1[0][1]=3;
//            m1[0][2]=67;
//            m1[1][0]=90;
//            m1[1][1]=89;
//            m1[1][2]=87;
//
//            int[][] m2= new int[2][3];
//            m2[0][0]=25;
//            m2[0][1]=43;
//            m2[0][2]=7;
//            m2[1][0]=9;
//            m2[1][1]=80;
//            m2[1][2]=67;
////            adding two-d array
//            for(int i=0;i<m1.length;i++){
//                for(int j=0;j<m2.length+1;j++){
//                    int c= m1[i][j]*m2[i][j];
//                    System.out.print(c+" ");
//                }
//            }
// Factorial by recursion
//       factorial obj= new factorial();
//        System.out.println( obj.meth(5));

//        Getter and Setter
//        sunday obj=new sunday();
//        obj.setA(8907);
//        System.out.println(obj.getA());
//        obj.setS("hasdjglasfjlhgjlfgluyfguyegfuygeruylfgyjgfuywgeuyf6348758679482");
//        System.out.println(obj.getS());

//        Constructor
//        employee10 obj= new employee10();
    }
}