get JAVA Line info for log.

MyLineInfo.java

package info.gooooloo;

public class MyLineInfo {
    public static String info() {
        final StackTraceElement element = new Exception().getStackTrace()[1];
        return String.format("%s#%s,%s:%d",
                element.getClassName(),
                element.getMethodName(),
                element.getFileName(),
                element.getLineNumber());
    }

    static class AAA {
        public void foo() {
            System.out.println(MyLineInfo.info());
        }
    }

    public static void main(String[] args) {
        System.out.println(MyLineInfo.info());
        System.out.println(MyLineInfo.info());
        new AAA().foo();
        System.out.println(MyLineInfo.info());
        System.out.println(MyLineInfo.info());
        System.out.println(MyLineInfo.info());
    }
}