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我正在尝试使用PrintWriter.java但我遇到了一个相当奇怪的问题,我无法弄清楚我在这里缺少什么。

MyPrintWriter.java

public class MyPrintWriter {

    public static void main(String[] args) {

        File myFile = new File("myFileDirectory/myFileName.txt");
        try {

            FileWriter fw = new FileWriter(myFile);
            PrintWriter pw = new PrintWriter(fw);
            pw.println("Hello World!");

            pw.close();

        }   catch (FileNotFoundException e) {
                System.err.println("File not found: " + myFile);
        }   catch (Exception e) {
                e.printStackTrace();
        }       
    }

}

MyFileWriter.java

public class MyFileWriter {
    public static void main(String[] args) {

        File myFile = new File("myFileDirectory/myFileName.txt");
        try {
            InputStreamReader isr = new InputStreamReader(System.in);
            BufferedReader br = new BufferedReader(isr);

            FileWriter fw = new FileWriter(myFile);
            PrintWriter pw = new PrintWriter(fw);

            String input;
            input = br.readLine();
            while(input != null) {
                pw.println(input);
                input = br.readLine();
            }           
            br.close();
            pw.close();

        }   catch (FileNotFoundException e) {
                System.err.println("File not found: " + myFile);
        }   catch (Exception e) {
                e.printStackTrace();
        }       
    }

}

MyPrintWriter.java正在愉快地写入myFileName.txt文件,但MyFileWrite.java不能。

有人可以帮助我了解我在这里缺少什么吗?

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1 回答 1

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你可能需要冲洗你的印刷作家。

PrintWriterFileWriter参数的构造函数创建一个autoFlush设置为 off的 PrintWriter

pw.flush()之前打电话pw.close();应该可以解决问题

于 2011-07-18T14:02:10.223 回答