String对象的相等

package objectnextpart;

public class final {
final(string a) {
}

public static void main(string[] args) {

final f1 = new final("hello");
final f2 = new final("hello");
system.out.println(f1 == f2);// false
system.out.println(f1.equals(f2));// false
system.out.println(f1.hashcode());// 366712642
system.out.println(f2.hashcode());// 1829164700

string f3 = new string("world");
string f4 = new string("world");
system.out.println(f3 == f4);// false
system.out.println(f3.equals(f4));// true
system.out.println(f3.hashcode());// 113318802
system.out.println(f4.hashcode());// 113318802
}
}