public class TestString { public static void main(String[] args) { String string1 = new String("foo"); String string2 = new String("foo"); String string3 = new String("bar"); String string4 = string3; System.out.println("string1.equals(string2): " + string1.equals(string2) ); System.out.println("string2.equals(string3): " + string2.equals(string3) ); System.out.println("string3.equals(string4): " + string3.equals(string4) ); System.out.println("string1.compareTo(string2): " + string1.compareTo(string2) ); System.out.println("string2.compareTo(string3): " + string2.compareTo(string3) ); System.out.println("string3.compareTo(string4): " + string3.compareTo(string4) ); System.out.println(); System.out.println("string1 == string2: " + (string1 == string2) ); System.out.println("string2 == string3: " + (string2 == string3) ); System.out.println("string3 == string4: " + (string3 == string4) ); string4 = string4 + "more stuff"; System.out.println("string3 == string4: " + (string3 == string4) ); } }
$ java TestString string1.equals(string2): true string2.equals(string3): false string3.equals(string4): true string1.compareTo(string2): 0 string2.compareTo(string3): 4 string3.compareTo(string4): 0 string1 == string2: false string2 == string3: false string3 == string4: true string3 == string4: false
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