工具类

package com.gxjy.util;

import java.util.HashMap;
import java.util.Map;

//让桌面应用程序拥有session
public class MySession {
     @SuppressWarnings("rawtypes")
	 private final Map session = new HashMap();
     private static final MySession instance = new MySession();
     private MySession() { /* empty */}
     public static MySession getInstance() { return instance;}
     public Object getItem(String key) { return session.get(key);}
     @SuppressWarnings("unchecked")
	 public Object setItem(String key, Object value) { return  session.put(key, value);}
     public Object removeItem(String key) { return  session.remove(key); }
     public void clear() { session.clear(); }
}

使用如：

MySession.getInstance().setItem("num", 1);

获取使用getItem方法