上代码 ` private static final Logger logger = LoggerFactory.getLogger(ThreadTest.class);

public void test_1(final AuthorizeContractBean bean){new Thread(new Runnable() {[@Override](https://my.oschina.net/u/1162528)public void run() {bean.setBorrowerId("1");logger.info(bean.toString());try {Thread.sleep(20000);} catch (InterruptedException e) {e.printStackTrace();}}}).start();}
[@Test](https://my.oschina.net/azibug)
public void test_2(){for (int i = 0; i < 1000; i++) {AuthorizeContractBean b = new AuthorizeContractBean();if(i % 2 == 0){b.setPlatformNo("aaa");b.setFileUrl("aaa-url");test_1(b);} else {b.setPlatformNo("bbbb");b.setFileUrl("bbb-url");test_1(b);}}
}`

最终输出结果

17:43:43.077 [Thread-5] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.075 [Thread-2] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.077 [Thread-4] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.077 [Thread-3] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.075 [Thread-1] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.077 [Thread-6] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.078 [Thread-7] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.079 [Thread-8] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.079 [Thread-9] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.079 [Thread-10] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.079 [Thread-11] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}
17:43:43.079 [Thread-12] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='bbb-url', platformNo='bbbb'}
17:43:43.079 [Thread-13] INFO  c.i.ups.app.contract.Test.ThreadTest - AuthorizeContractBean{borrowerId='1', fileUrl='aaa-url', platformNo='aaa'}

说明bean对象的值是可以被改变的。

但是bean不能被重新指向别的引用。

总结：final修饰的对象，引用不可被改变，但对象内的值可以被改变。但普通变量只能赋值一次。 参考网址：输入链接说明