In Java,
String s1 = new String("abc");
String s2 = new String("ab") + new String("cd");
Will string "abc" and "abcd" be created in string constant pool?
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DanielBarbarian
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bob
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1 Answers
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Neither s1 nor s2 will point to strings in the constant pool because you created them by a combination of explicit constructor calls and concatenation. Only the string literals "abc", "ab", and "cd" will be in the constant pool.
You would need to explicitly intern() the new instances. In that case, s1 == "abc" would become true.
Marko Topolnik
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s2.intern(); String s3 = "abcd"; Why s2 == s3 is true in jdk1.7? – bob Jun 27 '16 at 11:18
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It should be true in any JDK since s2 an s3 should see the same instance in the constant pool. – Marko Topolnik Jun 27 '16 at 11:21
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Thanks a lot and I understand it finally. – bob Jun 10 '17 at 13:45