Why is there difference between difference of System.out.println(+c1) and System.out.println("c1" = +c1)?

Question

When I use:

char c1 = '\u534e';
System.out.println(+c1);

Then I get:

21326

But when I use:

char c1 = '\u534e';
System.out.println("c1 = " +c1);

Then I got the char printed correctly:

c1 = 华

What's the problem?

Answer 1

There are 3 scenarios in your question :

1. System.out.println(+c1);

Adding + with a char type will convert it to int, so it will call println(int) method of System.out, making it to print an integer value for that character.

2. System.out.println(c1);

In this case we haven't added +, so it is still taking as char, so in this case println(char) will be called and this will cause actual char to be printed.

3. System.out.println("c1 = " +c1);

When we concatenate a char type to String, whole concatenation will be treated as String, so in this case println(String) will be called and actual character with rest of the string get printed.