java - 使用 Java 检查用户输入是否为空

Question

我环顾四周，没有找到解决办法。我的代码应该接受用户的输入，并在输入为空白时停止。代码一开始很简单，但现在我想我把它弄得太复杂了，所以很抱歉。

Scanner read = new Scanner(System.in);
System.out.println("Input words, enter blank to stop");
boolean working = true;
do {
    if(working == false)
    {
        break;
    }

    String a = read.next();

    if (a.equals("")) {
        working = false;
        System.out.println("no data");    
    } else {
        Container.addWord(a);
    }
} while (working == true);

谢谢。

Answer 1

将 next() 更改为 nextLine():

Scanner read = new Scanner(System.in);
System.out.println("Input words, enter blank to stop");
boolean working = true;
do {
    if (working == false) {
        break;
    }
    String a = read.nextLine();
    if (a.isEmpty()) {
        working = false;
        System.out.println("no data");
    } else {
        Container.addWord(a);
    }
} while (working == true);