我制作了一个程序来生成一个带有数字的文件 但是程序没有在它创建的文件中输入任何东西!
这是代码:
private void OpenMenuActionPerformed(java.awt.event.ActionEvent evt) {
ModFile=new File(NameText.getText() + ".mod");
FileWriter writer = null;
try {
writer = new FileWriter(ModFile);
} catch (IOException ex) {
Logger.getLogger(ModMakerGui.class.getName()).log(Level.SEVERE, null, ex);
}
if(!ModFile.exists()){
try {
ModFile.createNewFile();
System.out.println("Mod file has been created to the current directory");
writer.write(CodesBox.getText());
} catch (IOException ex) {
Logger.getLogger(ModMakerGui.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
当我创建一个随机文件时,我打开它时看不到任何东西!
请帮助
感谢Amir的帮助,但我注意到我应该使用FileOutputStream和DataOutputStream ...
所以,我再次需要帮助,导致出现同样的问题:(
File ModFile =new File(NameText.getText() + ".mod");
try {
FileOutputStream fos = new FileOutputStream(ModFile);
DataOutputStream dos = new DataOutputStream(fos);
int i = Integer.parseInt(CodesBox.getText());
dos.writeInt(i);
// and other processing
} catch (IOException ex) {
Logger.getLogger(ModMakerGui.class.getName()).log(Level.SEVERE, null, ex);
}finally{
try{
dos.close();
} catch(IOException e) {
e.printStackTrace();
}
}
NetBeans表示他们找不到符号dos(dos.close();)
请再次帮助我
答案 0 :(得分:0)
NameText.getText()
。您应该在处理后关闭文件
private void OpenMenuActionPerformed(java.awt.event.ActionEvent evt){
//check before file name is nt null
File ModFile =new File("somefile" + ".mod");
FileWriter writer = null;
try {
writer = new FileWriter(ModFile);
writer.write("test..................");
// and other processing
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}finally{
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
+++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++
使用FileOutputStream
并写入字节数组遵循以下代码
private static void OpenMenuActionPerformed(java.awt.event.ActionEvent evt) {
//check before file name is nt null
File ModFile =new File("somefile" + ".mod");
FileOutputStream writer = null;
String toProcess = "00D0C0DE00D0C0DE F000000000000000";
try {
writer = new FileOutputStream(ModFile);
writer.write(toProcess.getBytes(),0,toProcess.getBytes().length);
} catch (IOException ex) {
Logger.getLogger(Test.class.getName()).log(Level.SEVERE, null, ex);
}finally{
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}