Hi Friend,

Try the following codes:

1)

public class MaxMin {
 public static void main(String[] args) {
     int a=2;
     int b=4;
     int c=5;
     int d=6;
      int arr[]={a,b,c,d};
    int max = arr[0];
    int min = arr[0];

        for(int i=1;i<arr.length;i++){
           if (arr[i] > max) {
           max = arr[i];
            }
        }
        System.out.println("Largest Number: "+max);
        for (int i=1; i<arr.length; i++) {
            if (arr[i]< min) {
                min = arr[i];
            }
        }
        System.out.println("Smallest Number: "+min);
     }
}

2)

class Calculate{
    int i,j;
    Calculate(int i,int j){
    this.i=i;
    this.j=j;
}
public int add(){
    return i+j;
}
public int multiply(){
    return i*j;
}
public int subtract(){
    int result=0;
    if(i>j){
    result= i-j;
    }
    else{
    result= j-i;
    }
    return result;
}
public int divide(){
    int result=0;
    if(i>j){
    result= i/j;
    }
    else{
    result= j/i;
    }
    return result;
}
public int modulus(){
    int result=0;
    if(i>j){
    result= i%j;
    }
    else{
    result= j%i;
    }
    return result;
}
public int check(){
    int greater=0;
    if(i>j){
        greater=i;
    }
    else{
        greater=j;
    }
    return greater;
}
    public static void main(String[] args){
        Calculate c=new Calculate(8,10);
        System.out.println("Addition= "+c.add());
        System.out.println("Subtraction= "+c.subtract());
        System.out.println("Multiplication= "+c.multiply());
        System.out.println("Division= "+c.divide());
        System.out.println("Modulus= "+c.modulus());
        System.out.println("Greater value= "+c.check());
    }
}

Thanks