Java Scanner实现判断键盘输入内容

/**
* 扫描流
* @author liuhuiyan
*
*/
public class TestScanner {
public static void main(String[] args) throws Exception{
Scanner scanner =new Scanner(System.in);//接收键盘输入的数据
System.out.println("请输入数据：");
if (scanner.hasNext()) {//现在有输入数据
System.out.println("您输入的内容为："+scanner.next());
}
scanner.close();//此处一般省略
}
}