程序如下：
∥Java_1. java
∥********** Found **********
Import ( 1 ) ;
public class Java_1
public static void main(String args[ ])
String s1="hashcode",
s2="HashCode";
String output="\""+s1+"\"的Hash码是"+s1. hashCode( )+"\n\""+s2+"\"的Hash码
是"+s2. hashCode( );
JOptionPane. showMessageDialog ( null, output,"显示字符串类的hash码",
∥********** Found **********
JOptionPane. ( 2 ) );
System. exit(0);