strequals.java

Java Classic Examples是我买的两本书：《JAVA经典实例》和《java入门经典源代码》里边附送光盘里带的源码

public class Strequals
{
    public static void main(String args[])
    {
        String s="Hello";
        String t="Hello";
        System.out.println("s==t  "+(s==t));
        System.out.println("s.equals(t)="+s.equals(t));
        s = new String();
        System.out.println("s.equals(null)="+s.equals(null));
        System.out.println("s==null  "+(s==null));
        System.out.println("s=  "+s.toString());
    }
}