String Literals

String Literals

package testPackage;
class Test {
    public static void main(String[] args) {
        String hello = "Hello", lo = "lo";
        System.out.println(hello == "Hello");
        System.out.println(Other.hello == hello);
        System.out.println(other.Other.hello == hello);
        System.out.println(hello == ("Hel"+"lo"));
        System.out.println(hello == ("Hel"+lo));
        System.out.println(hello == ("Hel"+lo).intern());
    }
}

produces the output:

true
true
true
true
false
true

参考：https://docs.oracle.com/javase/specs/jls/se17/html/jls-3.html#d5e1973

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