unable to make out this assignment in java

Question

can anybody explain this why its happening

int i=0;
i=i++;
i=i++;
i=i++;
System.out.println(i);

it prints zero.

Answer 1

Let I=++, an increase, and A=i, an assignment. They are non-commutative: IA != AI.

Summary

IA = "first increase then assignment"

AI="first assignment then increase"

Counter-Example

$ javac Increment.java 
$ java Increment 
3
$ cat Increment.java 
import java.util.*;
import java.io.*;

public class Increment {
    public static void main(String[] args) {
        int i=0;
        i=++i;
        i=++i;
        i=++i;
        System.out.println(i);
    }
}

Related

• Initialization, assignment and declaration