慕仰0522570
从控制台/键盘读取输入字符串的方法不多。下面的示例代码演示如何使用Java从控制台/键盘读取字符串。public class ConsoleReadingDemo {public static void main(String[] args) {
// ====
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Please enter user name : ");
String username = null;
try {
username = reader.readLine();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("You entered : " + username);
// ===== In Java 5, Java.util,Scanner is used for this purpose.
Scanner in = new Scanner(System.in);
System.out.print("Please enter user name : ");
username = in.nextLine();
System.out.println("You entered : " + username);
// ====== Java 6
Console console = System.console();
username = console.readLine("Please enter user name : ");
System.out.println("You entered : " + username);}}使用的代码的最后一部分java.io.Console班级，等级。无法从System.console()当通过Eclipse运行演示代码时。因为Eclipse将应用程序作为后台进程运行，而不是作为带有系统控制台的顶级进程运行。