Java,int x = 5; System.out.println(" x + 5 是 " + x + 5); System.out.println("x += 5 是 " + x += 5); 为什么第二个 println 是错误的？

Question

Java int x = 5;

    System.out.println(" x + 5 is " + x + 5);//correct
    System.out.println("x += 5 is " + x += 5);// why wrong?

Even though, these 2 println is including calculation but why second println is error.Thanks

Answer 1

What you are doing causes an error because the + is seen as an operator to seperate parts of the string. Try placing that part between brackets like:

System.out.println("x += 5 is " + (x += 5));

This might fix it as you exclude the + from the string. Hope this helps you a bit, and that I am correct in my statement.