一个类有两个方法，其中一个是同步的，另一个是非同步的；

现在又两个线程A和B，请问：当线程A访问此类的同步方法时，线程B是否能访问此类的非同步方法？

答案：可以

验证

package com.my.test2;public class ClassA {    public synchronized void do1()    {        //延迟打印，为了更明显        try {            Thread.sleep(3000);        } catch (InterruptedException e) {            e.printStackTrace();        }        System.out.println("synchronized do1");    }        public void do2()    {        System.out.println("do2");    }        }package com.my.test2;public class Thread1 extends Thread{    private ClassA classA;        public Thread1(ClassA classA)    {        this.classA = classA;    }    @Override    public void run() {        classA.do1();    }}package com.my.test2;public class Thread2 extends Thread{    private ClassA classA;        public Thread2(ClassA classA)    {        this.classA = classA;    }    @Override    public void run() {        classA.do2();    }}package com.my.test2;public class Test {    /**     * @param args     */    public static void main(String[] args) {        ClassA classA = new ClassA();        Thread1 thread1 = new Thread1(classA);        Thread2 thread2 = new Thread2(classA);                thread1.start();        thread2.start();    }}

执行结果：

do2

synchronized do1   //延迟3秒后输出