package lession1;
public class HelloWorld {
private String name = "java2000";
public HelloWorld() {
this.name = "www.java2000.net";
}
public HelloWorld(String name) {
System.out.println(this.name);
}
{
name = "java2000.net";
}
static public void main(final String[] args) {
new HelloWorld("http://www.java2000.net");
}
}这段代码的输出是
A：java2000
B：java2000.net
C：
www.java2000.net
D：
http://www.java2000.net
E：编译失败
F：运行异常
答案: B
java2000.net
分析：
代码块属于类一级的，他们在类初始化的时候运行，也就是说，这个代码和下面的这个代码等价
package lession1;
import java.io.PrintStream;
public class HelloWorld
{
private String name;
public HelloWorld()
{
name = "java2000";
name = "java2000.net";
name = "www.java2000.net";
}
public HelloWorld(String name)
{
this.name = "java2000";
this.name = "java2000.net";
System.out.println(this.name);
}
public static void main(String args[])
{
new HelloWorld("http://www.java2000.net");
}
}真是有趣的JAVA哦！呵呵！
