不变性

Immutable

final 的题

String a = "lee1";
final String b = "lee";
String c = "lee";
String str1 = b + 1;
String str2 = c + 1;
// question
// 1. a == str1 ? 
// 2. a == str2 ?

• 键入 123 看解释

String a = "lee1";
final String b = getString();
String str1 = b + 1;
private String getString() {
    return "lee";
}
// question
// a == str1 ?