Question

使用for循环为char数组赋值后，如何在for循环外访问这些值？因为我需要稍后操作值，删除重复的值。感谢您的任何帮助。非常感激。

public static void processLine(File input, File output) throws FileNotFoundException{ 
Scanner i = new Scanner(input);
PrintStream o = new PrintStream(output);
while(i.hasNextLine()){
    String text = i.nextLine();      
    char[] pos = new char[text.length()];
    for (int x = 0; x < text.length();x++){
        pos[x] = text.charAt(x);
        }
    }   
}

Answer 1

如前所述user3580294，只需通过声明执行循环的结构来存储数据。然后在循环内部存储数据，在循环之后，您可以享受它并使用它！

public static void processLine(File input, File output) throws FileNotFoundException{ 
        Scanner i = new Scanner(input);
        PrintStream o = new PrintStream(output);

        ArrayList<String> saved= new ArrayList<String>();

        while(i.hasNextLine()){
            String text = i.nextLine();      
            char[] pos = new char[text.length()];
            for (int x = 0; x < text.length();x++){
                pos[x] = text.charAt(x);
            }

            saved.add(text);
        }


        // you can use "saved" here ! :) but this code can be shorter I think
    }

您可以删除此步骤：

for (int x = 0; x < text.length();x++){
                pos[x] = text.charAt(x);

并将其替换为：

saved.add(text);

最终结果应为：

public static void processLine(File input, File output) throws FileNotFoundException{ 
    Scanner i = new Scanner(input);
    PrintStream o = new PrintStream(output);

    ArrayList<String> saved= new ArrayList<String>();

    while(i.hasNextLine()){
        String text = i.nextLine();                 
        saved.add(text);
    }


    // you can use "saved" here ! :) enjoy
}

如何在使用for循环分配值后访问数组

1 个答案: