基本輸入. 在java中，若需要由使用者輸入一些東西以供程式使用，首先必須新增一個Scanner來讀取： Scanner sc = new Scanner(System.in); 但若直接輸入上述的程式，會 ... ... <看更多>

If you are doing user input in your Java apps, you'll likely be using the Java Scanner. If that's the case, a Java Scanner import will be ... ... <看更多>

import java.util.*;. public class Main {. public static void main(String[] args) throws IOException. {. File file = new File(args[0]);. Scanner sc = new ... ... <看更多>

Just catching exceptions is not enough; you must also change the code path accordingly. Your code has the form: Scanner ls = null; try { ls ... ... <看更多>