【Java学习笔记】控制台读写

import java.io.Console;

public class ConsoleLogin {
    public static void main(String arg[]) {
        Console con;
        con = System.console();
        if(con == null) {
            System.out.println("No console available.");
            return;
        }
        String name = con.readLine("name: ");
        char pw[] = con.readPassword("password: ");
        String password = new String(pw);
        System.out.println("The login name is " + name +
                           " and the pass word is " + password);
    }
}
======================
import java.io.Console;

public class ConsoleOutput {
    public static void main(String arg[]) {
        Console con;
        con = System.console();
        if(con == null) {
            System.out.println("No console available.");
            return;
        }
        int value = 31520;
        con.printf("The number %d as hexidecimal is %4X/n",value,value);
    }
}
 
 
注意Console这个类的read和write方法是synchronized，而且console可能不存在（当然，你要是使用cmd或者shell则一定存在），最好使用flush刷新display