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我想做一個程序，它執行時間表，它將一個名爲log.txt的文件輸出爲一個日誌文件，但是當我運行它時，它所做的只是運行，並且執行時間表並生成文件，但什麼都不寫入文件。有人可以告訴我，我的代碼有什麼問題嗎？如果你這樣做，謝謝。使用Writer後，爲什麼我的文件中沒有輸出？
重點：
- [=的.jar文件可運行]
- [.ZIP =源代碼]
下載鏈接： - http://wardogsk93-ftp.bugs3.com/Downloads/Java/Counter/
Java文檔： - http://wardogsk93-ftp.bugs3.com/Downloads/Java/Counter/Java%20Doc/
Main.java :-
public class Main {
/************************************************/
/*************STUFF YOU CAN CHANGE***************/
/************************************************/
/** change this to start at a different number must be a number {@link Integer}**/
public static int minCount = 1;
/** change to change the number of where the programme will end must be a number {@link Integer}**/
public static int maxCount = 10;
/** change this to how many times you want to sleep for in seconds (1 = 1 second, 2 = 2 second, 10 = 10 second) before moving to next sum must be a number {@link Integer} **/
public static int sleepAmountMultiplyer = 1;
/** true = outputs to the command prompt/false = outputs to eclipse console {@link boolean}**/
public static boolean outputTOCMD = true;
/************************************************/
/******DONT CHANGE ANYTHING BELOW THIS LINE******/
/************************************************/
/** allows to output to a command prompt **/
private static Console cmd;
private static Output file;
private static int endNumber = maxCount + 1;
private static int sleepAmount = 1000 * sleepAmountMultiplyer;
/**
* main method
* call this to start
**/
public static void start() {
file = new Output();
if (outputTOCMD) {
cmd = new Console();
count();
cmd.exit();
} else {
count();
System.exit(1);
}
}
public static Main getInstance() {
return Main.getInstance();
}
/**code to start running**/
private static void count() {
try {
for (int i = minCount; i < maxCount + 1; i++) {
int j = i * i;
Thread.sleep(sleepAmount);
if (i == endNumber) {
return;
}
if (outputTOCMD) {
cmd.out(i + " X " + i + " = " + j);
file.write(String.valueOf(i) + " X " + String.valueOf(i) + " = " + String.valueOf(j));
} else {
System.out.println(i + " X " + i + " = " + j);
file.write(String.valueOf(i) + " X " + String.valueOf(i) + " = " + String.valueOf(j));
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
Output.class： -
import java.io.*;
public class Output {
public Output() {}
private Console cmd;
private File logFile;
private String input;
private BufferedReader reader;
private BufferedWriter writer;
public Output(Console cmd, File logFile, BufferedReader reader, BufferedWriter writer) {
this.cmd = cmd;
this.logFile = logFile;
this.reader = reader;
this.writer = writer;
}
/** writes to a log file using {@link FileWriter} **/
public void write(String message) {
try {
logFile = new File("log.txt");
writer = new BufferedWriter(new FileWriter(logFile));
if (!logFile.exists()) {
writer.write(message);
writer.close();
} else {
read();
if (logFile.isFile()) {
logFile.delete();
writer.write(message);
}
}
} catch (IOException e) {
if (Main.outputTOCMD) {
cmd.out(e.getMessage());
} else {
e.printStackTrace();
}
}
}
/** writes to a log file using {@link FileReader} **/
public void read() {
try {
logFile = new File("log.txt");
reader = new BufferedReader(new FileReader(logFile));
if (logFile.exists()) {
setInput(reader.readLine());
}
} catch (IOException e) {
if (Main.outputTOCMD) {
cmd.out(e.getMessage());
} else {
e.printStackTrace();
}
}
}
/**
* @return the input
*/
private String getInput() {
return input;
}
/**
* @param input the input to set
*/
private String setInput(String input) {
this.input = input;
return input;
}
}
Console.class： -
import java.awt.Color;
import java.awt.Image;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JTextArea;
/**
* Creates the command prompt window in class {@link Console}
*/
public class Console {
private JFrame frame;
private JTextArea console;
private Image icon;
public Console() {
try {
frame = new JFrame();
frame.setBackground(Color.BLACK);
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setName("Commad Prompt");
frame.setSize(678, 340);
frame.setTitle(frame.getName());
frame.setVisible(true);
icon = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/en/e/ef/Command_prompt_icon_(windows).png")).getImage();
frame.setIconImage(icon);
console = new JTextArea();
console.setAutoscrolls(true);
console.setBackground(Color.BLACK);
console.setEditable(false);
console.setForeground(Color.WHITE);
console.setSelectionColor(Color.WHITE);
console.setSelectedTextColor(Color.BLACK);
console.setVisible(true);
frame.add(console);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
/**
* @param {@link String} text does the same as {@link System}.out.println();
*/
public void out(String text) {
console.append(text + "\n");
}
/**
* @exception {@link Exception} to catch any errors and prints them to the window
* does the same has {@link System}.exit(1);
*/
public void exit() {
try {
Thread.sleep(1000 * Main.sleepAmountMultiplyer);
console.disable();
frame.dispose();
System.exit(1);
} catch (Exception e) {
this.out(e.getMessage());
}
}
/**
* @return Allows you to acces all the stuff in <br>{@link Console}</br>
**/
public Console getInstance() {
return this;
}
}
Launch File:-
public class Test {
public static void main(String[] args) {
Main.minCount = 1;
Main.maxCount = 10;
Main.sleepAmountMultiplyer = 1;
Main.outputTOCMD = true;
Main.start();
}
}
調試它怎麼樣？ –
或者爲它編寫測試？ –
我試過調試它，但它所做的只是運行並生成文件但不記錄它 – WARDOGSK93