Why does Java's == not work for comparing two strings with the same value?

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Why does Java's == not work for comparing two strings with the same value?

asked about 1 year ago

I am learning Java and I wrote this code:

1String a = new String("hello");
2String b = new String("hello");
3System.out.println(a == b); // prints false

1String a = new String("hello");
2String b = new String("hello");
3System.out.println(a == b); // prints false

I expected this to print true because both strings have the same content. Why does == not work here?

java

1 Answer

John Doe

• answered about 1 year ago

The == operator compares object references, not their contents. Even though both a and b contain "hello", they are two separate objects. Use .equals() instead:

1System.out.println(a.equals(b)); // true

1System.out.println(a.equals(b)); // true

If you want to compare memory references, use ==. For content comparison, always use .equals().

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