Print current line number in intellij

Question

I am trying to print the current line number(line number of ide) of a certain code from intellij. How do I do that?

1 System.out.print(getCurrentLineNo());//sample code
2 System.out.print(getCurrentLineNo());//sample code
3 System.out.print(getCurrentLineNo());//sample code
4 System.out.print(getCurrentLineNo());//sample code

use debugging mode https://www.jetbrains.com/help/idea/starting-the-debugger-session.html — Na Felix Wimpy Wijaya, Jun 26 '19 at 06:53
hmm I am trying to print it in my way. like this code. print("I am in line number " + getCurrentLineNo()); — AyukNayr, Jun 26 '19 at 07:00

score 3 · Accepted Answer · answered Jun 26 '19 at 06:59

One way to do this is to get the stack trace element and call getLineNumber.

public static int getCurrentLineNumber() {
    return Thread.currentThread().getStackTrace()[2].getLineNumber();
}

Note that I used an index of 2 because that refers to the frame of the method that calls getCurrentLineNumber. If you are just doing this inline, i.e. like this:

System.out.println(Thread.currentThread().getStackTrace()[1].getLineNumber());

You should use an index of 1 instead.

Note that an index of 0 refers to the frame of the getStackTrace method.

score 1 · Answer 2 · answered Jun 26 '19 at 06:59

1

I suppose it too expensive to get StatckTrace for that, but it can help you for some debug.

System.out.println(new Exception().getStackTrace()[0].getLineNumber());

Also, you can look here

answered Jun 26 '19 at 06:59

Dred

1,076
8
24

score 1 · Answer 3 · answered Jun 26 '19 at 07:01

1

You can get line number like this...

public static int getCurrentLineNo() {
        return Thread.currentThread().getStackTrace()[2].getLineNumber();
    }

answered Jun 26 '19 at 07:01

Rowi

545
3
9

Print current line number in intellij

3 Answers3