Java比较要做

public class Test {

   public static void main(String args[]) {

      String str1 = "Strings are immutable";

      String str2 = new String("Strings are immutable");

      String str3 = new String("Integers are not immutable");



      int result = str1.compareTo( str2 );

      System.out.println(result);



      result = str2.compareTo( str3 );

      System.out.println(result);

   }

}