VolatileTest.java

/*
 * Copyright 1999-2012 Alibaba Group.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package fm.liu.timo;

import org.junit.Test;

/**
 * @author xianmao.hexm 2012-5-9
 */
public class VolatileTest {
    @Test
    public void testNoop() {}

    static class VolatileObject {
        volatile Object object = new Object();
    }

    public static void main(String[] args) {
        final VolatileObject vo = new VolatileObject();

        // set
        new Thread() {
            @Override
            public void run() {
                System.out.print("set...");
                while (true) {
                    vo.object = new Object();
                }
            }
        }.start();

        // get
        new Thread() {
            @Override
            public void run() {
                System.out.print("get...");
                while (true) {
                    Object oo = vo.object;
                    oo.toString();
                }
            }
        }.start();
    }

}