Question

System.out.print("Enter some stuff:");
    while (input.hasNext()){
        System.out.print(input.next()+ " ");
    }

每当此项运行时，它会要求用户输入，然后将其全部打印出来。但是，我想要的是一个打印出扫描仪所有标记的循环。然后，它意识到没有更多的令牌，并且循环退出。

Answer 1

好吧，你想把这些令牌读成ArrayList，就像这样：

List<String> store = new ArrayList<String>();
// read them all in and add them to our list
while (input.hasNext())
    store.add(input.next());
// now print them all out
for (String s: store)
    System.out.print(s+ " ");

这样做是为了全部阅读，并将它们放入ArrayList;然后，当没有什么可读的时候，读取循环退出。之后，它将它们全部打印出来。我想这就是你的想法。如果你想在添加它们时打印它们，那么你可以

List<String> store = new ArrayList<String>();
// read them all in and add them to our list
while (input.hasNext()) {
    String s = input.next();
    store.add(s);
    System.out.print(s+ " ");
}
for (String s: store) {
    // do whatever you like with them
}

Answer 2

不要复制，尝试了解伙伴：

import java.io.*;
import java.util.StringTokenizer;

public class PrintStuff {

public static void main (String[] args) {
    System.out.print("Enter some shit seperated by space:");
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String str=""; 
    try {
        str = br.readLine();
    } catch (IOException ioe) {
        System.out.println("IO error trying to read bitch!");
    }

    StringTokenizer st = new StringTokenizer(str);

    while (st.hasMoreElements()) {
        System.out.println(st.nextElement());
    }
}

}

如何在java中创建一个循环来检查单个扫描仪行的next（）

2 个答案: