String 引用 与 值 的区别

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public class Main {private static String str = "abc";    public static void main(String[] args) {                String str1 = "a";          String str2 = "bc";          String str3 = new String("abc");        String combo = str1 + str2;          System.out.println(str == combo);          System.out.println(str3 == combo);          System.out.println(str == combo.intern());                              }}

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