將Java輸出導出到文本

Question

第一次使用Java社區，但我不了解如何格式化代碼以使其在此處正確顯示。 將我的輸出導出為記事本文本格式的教程使我感到困惑。 我將代碼上傳到一個文本文件中，供大家查看。

該代碼基本上用於比較真假類問題數組

package grades;

import java.io.*;
import javax.swing.*;
import java.text.*;
import java.lang.*;

public class Grades {

    String[] studentIDArr = new String[8];
    String score = "";
    String answer1 = "";
    String answer2 = "";
    String answer3 = "";
    String answer4 = "";
    String answer5 = "";
    String answer6 = "";
    String answer7 = "";
    String answer8 = "";
    String answer9 = "";
    String answer10 = "";
    int AnswerKey = 0;
    String answerKey1 = "";
    String answerKey2 = "";
    String answerKey3 = "";
    String answerKey4 = "";
    String answerKey5 = "";
    String answerKey6 = "";
    String answerKey7 = "";
    String answerKey8 = "";
    String answerKey9 = "";
    String answerKey10 = "";
    String Opt = "*****Enter T or F*****";
    int pass = 0;
    int fail = 0;
    int passcounter = 0;
    int failcounter = 0;
    JOptionPane popup = new JOptionPane();
    static int i = 0;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
            // TODO code application logic here

        //invoke the constructor method
        new Grades();

    }

    public Grades() {
        AnswerKey = Integer.parseInt(popup.showInputDialog("Please enter Answer Key Number"));
        if (AnswerKey == 0000) {
            answerKey1 = JOptionPane.showInputDialog(Opt);
            answerKey2 = JOptionPane.showInputDialog(Opt);
            answerKey3 = JOptionPane.showInputDialog(Opt);
            answerKey4 = JOptionPane.showInputDialog(Opt);
            answerKey5 = JOptionPane.showInputDialog(Opt);
            answerKey6 = JOptionPane.showInputDialog(Opt);
            answerKey7 = JOptionPane.showInputDialog(Opt);
            answerKey8 = JOptionPane.showInputDialog(Opt);
            answerKey9 = JOptionPane.showInputDialog(Opt);
            answerKey10 = JOptionPane.showInputDialog(Opt);
            for (i = 0; i < studentIDArr.length; i++) {
                studentIDArr[i] = JOptionPane.showInputDialog("Please enter Student ID");
                studentIDArr[i] = studentIDArr[i].replaceAll("[^0-9]", "");
                answer1 = JOptionPane.showInputDialog(Opt);
                if (answer1.equals(answerKey1)) {
                    pass = pass + 1;
                }
                answer2 = popup.showInputDialog(Opt);
                if (answer2.equals(answerKey2)) {
                    pass = pass + 1;

                }
                answer3 = popup.showInputDialog(Opt);
                if (answer3.equals(answerKey3)) {
                    pass = pass + 1;

                }
                answer4 = popup.showInputDialog(Opt);
                if (answer4.equals(answerKey4)) {
                    pass = pass + 1;

                }
                answer5 = popup.showInputDialog(Opt);
                if (answer5.equals(answerKey5)) {
                    pass = pass + 1;

                }
                answer6 = popup.showInputDialog(Opt);
                if (answer6.equals(answerKey6)) {
                    pass = pass + 1;

                }
                answer7 = popup.showInputDialog(Opt);
                if (answer7.equals(answerKey7)) {
                    pass = pass + 1;

                }
                answer8 = popup.showInputDialog(Opt);
                if (answer8.equals(answerKey8)) {
                    pass = pass + 1;

                }
                answer9 = popup.showInputDialog(Opt);
                if (answer9.equals(answerKey9)) {
                    pass = pass + 1;

                }
                answer10 = popup.showInputDialog(Opt);
                if (answer10.equals(answerKey10)) {
                    pass = pass + 1;

                }

                if (pass >= 0 && pass < 4) {
                    score = "F";
                    failcounter++;
                } else if (pass >= 4 && pass < 6) {
                    score = "C";
                    passcounter++;
                } else if (pass >= 6 && pass < 8) {
                    score = "B";
                    passcounter++;
                } else if (pass >= 8 && pass < 11) {
                    score = "A";
                    passcounter++;
                }
                fail = 10 - pass;
                System.out.println("Student ID: " + studentIDArr[i]);
                System.out.println("Student Score: " + score);
                System.out.println("The Student passed " + pass + " questions");
                System.out.println("The Student failed " + fail + " questions");

            }
            System.out.println("Number of Students Passed: " + passcounter);
            System.out.println("Number of Students Failed: " + failcounter);
        } else {
            JOptionPane.showMessageDialog(null, "Wrong Number", "Error!", JOptionPane.ERROR_MESSAGE);
        }

    }
}

Answer 1

我認為您想使用打印行所在的java.io.BufferedWriter 。

FileWriter fw = new FileWriter(file.getAbsoluteFile());         
BufferedWriter bw = new BufferedWriter(fw);     
bw.write(content);  
bw.close();