Simple Java quine, self replicating (self copying) Java code, with text blocks. This code can be run with Java 15+ or Java 13+ with special flags. License is public domain, no rights reserved.

Quine.java

public class Quine {
	public static void main(String[] args) {
		String textBlockQuotes = new String(new char[]{'"', '"', '"'});
		char newLine = 10;
	    String source = """
public class Quine {
	public static void main(String[] args) {
		String textBlockQuotes = new String(new char[]{'"', '"', '"'});
		char newLine = 10;
		String source = %s;
		System.out.println(source.formatted(textBlockQuotes + newLine + source + textBlockQuotes));
	}
}
""";
        System.out.println(source.formatted(textBlockQuotes + newLine + source + textBlockQuotes));
	}
}