public class test {
public static void main(String args[]) {
String a = "asdf";
String b = "asdf";
// String a = new String("asdf");
// String b = new String("asdf");
if (a == b)
System.out.println("Equal!");
else
System.out.println("Not equal!");

}
}

String a = "asdf";与String a = new String("asdf");有什么区别呢？？
谢谢了～～～