Methods Examples in Java

Void method(With return)

public class Display{
    public static void main(String[] args){
        Display casio = new Display();
        casio.add();

    }
    public void add(){
        return;
    }
}

Step-by-Step Execution

1. Program starts from main()
2. Display casio = new Display();
   • A new object of class Display is created.
3. casio.add();
   • The add() method is called.
4. Inside add():
   • return; simply exits the method
   • No value is returned because the method type is void
5. Program ends

Output

Mark Calculation Program

public class Marks{

    public static void main(String[] args){
        int total = sumMarks(100,98,78,95,91);
        int avg = average(total);
        grade(avg);
    }

    public static int sumMarks(int m1,int m2,int m3,int m4,int m5){
        int total = m1 + m2 + m3 + m4 + m5;
        return total;
    }

    public static int average(int total){
        int avg = total/5;
        return avg;
    }

    public static void grade(int avg){
        if(avg>=90){
            System.out.println("A");
         }
        else if(avg>=80){
            System.out.println("B");
         }
        else if(avg>=70){
            System.out.println("C");
         }
        else if(avg>=60){
            System.out.println("D");
         }
        else if(avg>=50){
            System.out.println("E");
         }
        else{
            System.out.println("Fail");
        }
    }
}

Step-by-Step Execution

1. The program starts from the main() method.
2. sumMarks(100,98,78,95,91) method is called.
3. Inside sumMarks():
   • All marks are added → 462
   • The value is returned to main()
4. average(total) method is called.
5. Inside average():
   • Average is calculated → 462 / 5 = 92
   • The value is returned to main()
6. grade(avg) method is called.
7. Inside grade():
8. Condition avg >= 90 is checked
9. "A" is printed
   • The program ends successfully.

Output