import java.util.Scanner;
/**
* Create Time: -03-17 07:28
*
* @author sheting
*/
public class TestEraserThread {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.print("请输入名称：");
String name = scanner.next();
System.out.print("请输入密码：");
EraserThread eraserThread = new EraserThread('#');
eraserThread.start();
String password = scanner.next();
eraserThread.setActive(false);
if ("sheting".equals(name) && "123456".equals(password)) {
System.out.println(String.format("欢迎%s", name));
break;
} else {
System.out.println("用户名或密码输入错误！请重新输入");
}
}
}
}
class EraserThread extends Thread {
private boolean active;
private String mask;
public EraserThread() {
this('*');
}
public EraserThread(char maskChar) {
active = true;
mask = "\010" + maskChar;
}
public void setActive(boolean active) {
this.active = active;
}
public boolean isActive() {
return active;
}
@Override
public void run() {
while (isActive()) {
System.out.print(mask);
try {
Thread.sleep(50);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
运行结果：
说明：在文本模式输出\010表示返回一个字符位置。
在Java1.6之后可以使用console.readPassword()方法隐藏用户输入的文本。
import java.io.Console;
/**
* Create Time: -03-17 09:19
*
* @author sheting
*/
public class Test {
public static void main(String[] args) {
Console console = System.console();
if (console == null) {
System.out.println("Couldn't get Console instance, maybe you're running this from within an IDE?");
System.exit(0);
}
char passwordArray[] = console.readPassword("Enter your secret password: ");
console.printf("Password entered was: %s%n", new String(passwordArray));
}
}
运行结果：
