Question

我目前有一个数组，其中包含从GUI发出的一组命令。我可以将命令列表打印到屏幕上，但是在将这些命令写入文本文件时遇到问题。我需要一些建议。这是打印到控制台的代码。

for (int i = 0; i < movementArray.length; i++)
{
    System.out.println(movementArray[i]);
}

Answer 1

首先使用StringBuilder创建String：

StringBuilder sb = new StringBuilder();
for (int i = 0; i < movementArray.length; i++)
{
    sb.append(movementArray[i]);
}
setContents(new File("your path here"), sb.toString());

setContents(File aFile, String aContents)方法将在文件中设置字符串内容。

public static void setContents(File aFile, String aContents)
            throws FileNotFoundException, IOException {
        if (aFile == null) {
            throw new IllegalArgumentException("File should not be null.");
        }
        if (!aFile.exists()) {
            throw new FileNotFoundException("File does not exist: " + aFile);
        }
        if (!aFile.isFile()) {
            throw new IllegalArgumentException("Should not be a directory: " + aFile);
        }
        if (!aFile.canWrite()) {
            throw new IllegalArgumentException("File cannot be written: " + aFile);
        }

        //declared here only to make visible to finally clause; generic reference
        Writer output = null;
        try {
            //use buffering
            //FileWriter always assumes default encoding is OK!
            output = new BufferedWriter(new FileWriter(aFile));
            output.write(aContents);
        } finally {
            //flush and close both "output" and its underlying FileWriter
            if (output != null) {
                output.close();
            }
        }
    }

Answer 2

使用PrintWriter或BufferedWriter。

http://docs.oracle.com/javase/7/docs/api/java/io/PrintWriter.html

http://docs.oracle.com/javase/7/docs/api/java/io/BufferedWriter.html

将数组的内容写入文本文件

2 个答案: