Java经典面试集.pdf
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2023-07-18
14:33:10
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笔试题及答案
一、选择题(单选，多选)
1， 分析如下代码，最后输出结果为：（ B ）
class GaoYang {
private String name;
public GaoYang(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public static void main(String[] args){
GaoYang gy1 = new GaoYang("高阳");
GaoYang gy2 = new GaoYang("高阳");
System.out.println(gy1.equals(gy2));
}
A) true B) false
2，分析如下代码块：
public class GaoYangTest implements Runnable {
int b = 100;
synchronized void m1() throws InterruptedException {
b = 1000;
Thread.sleep(500);
System.out.println("b=" + b);
}
synchronized void m2() throws InterruptedException {
Thread.sleep(250);
b = 2000;
}
public static void main(String[] args) throws InterruptedException {
GaoYangTest gy = new GaoYangTest();
Thread thread = new Thread(gy);
thread.start();
gy.m2();
System.out.println("main thread b=" +gy.b);
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