Java Console.readPassword(String fmt, Object ... args)方法範例

Java Console.readPassword(String fmt, Object … args)方法範例

Console.readPassword(String fmt, Object ... args)的語法如下所示。

public char[] readPassword(String fmt,   Object ... args)

範例

在下面的程式碼顯示如何使用Console.readPassword(String fmt, Object ... args)方法。

import java.io.Console;
// At: w w  ｗ.Y i IB AI .c OM 
public class Main {
  public static void main(String[] args) throws Exception {

    String fmt = "%2$5s";

    Console cnsl = System.console();

    if (cnsl != null) {
      String alpha = cnsl.readLine(fmt, "Your", "Name: ");

      System.out.println("Name is: " + alpha);

      char[] pwd = cnsl.readPassword(fmt, "Enter", "Password: ");

      System.out.println("Password is: " + pwd);
    }

  }
}

上面的程式碼生成以下結果。

F:\website\yiibai\worksp\src>javac Main.java

F:\website\yiibai\worksp\src>java Main
Name: yes
Name is: yes
Password:
Password is: [C@7d4991ad