如何覆盖现有文件Java
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how to overwrite existing file Java
提问by Andhika Kurnia Aufa Azham
i want to overwriting file that i have saved before, my SaveAs code :
我想覆盖我之前保存的文件，我的 SaveAs 代码：
public void SaveAs(){
judul = jTextJudul.getText();
s = area.getText();
if(s.length()>0){//jika s terisi
try {
dialog = new FileDialog(this,"Save File As",FileDialog.SAVE);
dialog.setFile(judul+".txt");
dialog.setVisible(true);
path=dialog.getDirectory()+dialog.getFile();
FileOutputStream fos=new FileOutputStream(path);
System.out.println(s);
byte[] b=s.getBytes();
fos.write(b);
fos.close();
setTitle(name);
}
catch(Exception e){
JOptionPane.showMessageDialog(this,e.getMessage());
}
}
else{
JOptionPane.showMessageDialog(this,"Apa anda yakin menyimpan file kosong?");
}
}
And my save code (that must be overwriting exist file)
还有我的保存代码（必须覆盖现有文件）
public void Save(){
dialog = new FileDialog(this,"Save",FileDialog.SAVE);
file = new File(path+".txt");
s = area.getText();
try{
// Create file
FileWriter fstream = new FileWriter(file,true);
BufferedWriter out = new BufferedWriter(fstream);
out.write(s);
//Close the output stream
out.close();
}
catch (IOException e){
JOptionPane.showMessageDialog(this,e.getMessage());
}
}
but when i save, the file will saved to "null.txt" This is not what I want. I would like to overwrite the file that i have saved before.
但是当我保存时，文件将保存到“null.txt” 这不是我想要的。我想覆盖我之前保存的文件。
采纳答案by Ehsan
Pass false as 2nd argument, to set append to false, so that you will overwrite the existing file:
将 false 作为第二个参数传递，将 append 设置为 false，以便覆盖现有文件：
FileOutputStream output = new FileOutputStream("output", false);
Check out the constructor documentation:
查看构造函数文档：
