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String a = "111";
        String b = new String("111");
        System.out.println(a == b);
        System.out.println(a.equals(b));
 
        a = b;
 
        String c = new String("111");
        System.out.println(a == c);
        System.out.println(a == b);
 
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true
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true
 
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