openjdk11 bug

bugString.java

/*
openjdk 11

true 0
false 0
true 0
true 0

openjdk17

true 0
true 0
true 0
true 0/

*/

public class bugString {
	static public void main(String p[]) {
		String a = "";
		String b = "".substring(0);
		String c = "1".substring(1);
		System.out.println(""
			+"\n"+(b==a)+" "+b.length()
			+"\n"+(c==a)+" "+c.length()
			+"\n"+(b.equals(a))+" "+b.length()
			+"\n"+(c.equals(a))+" "+c.length()
		);
	}
}