再说“==”
class QQ
{
public static void main(String[] args)
{
String a=new String("hi");
String b=new String("hi");
String cc="hi";
String dd="hi";
System.out.println(a==b);
System.out.println(a.equals(b));
System.out.println(cc==dd);
System.out.println(cc.equals(dd));
}
}
结果:false true true true