Increase and decrease of java parameters

In the basics of learning java, novices like me may be confused by i++ and ++i. I don’t know the difference between them. Here are examples to help you understand~

public class Demo04 {
    
    
    public static void main(String[] args) {
    
    
        int a = 1;
        int b = a++;      //先赋值给b再自增
        int c = ++a;      //先自增再赋值给c
        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println("============================");
        int i = 5;
        int m = i--;      //先赋值给m再自减
        int n = --i;      //先自减再赋值给n
        System.out.println(i);
        System.out.println(m);
        System.out.println(n);

    }
}

The output result is