equals 与==

1、equals 与==

import java.util.*;
public class _02_32{
public static void main(String[] args){
  String s1="bc";
  if(s1=="bc")
   System.out.println("s1==bc");
  else
    System.out.println("s1!=bc");
  if(s1.equals("bc"))
   System.out.println("s1 equals bc");
  else
    System.out.println("s1 不equals bc");


}
}