起動時に私のプログラムは私にメッセージjava.io.IOExceptionを与えます:ストリームが閉じました。それから、制限されたコンポーネントで開きます。ioexceptionストリームを終了する方法を修正しましたか?
私は、ストリームが例外を閉鎖していることを理解していますが、私の場合、修正方法を理解できません。私は本当に助けに感謝します。 (私は、コードの大きな塊について申し訳ありませんが、私はあなたが私を助けるために必要なものをわからない)私は何を見つけるのですが、私は)(br1.closeを削除していたときにストリームが閉じられていることである
try {
//Defines new file reader and buffered reader
FileReader file_to_read = new FileReader(path);
BufferedReader br1 = new BufferedReader(file_to_read);
//action code
try {
//Finds the line number to see the number of cards in each set
lnr2= new LineNumberReader(new FileReader(new File("C:\\Users\\priceadria\\Desktop\\Words_" + strSetName + ".txt")));
lnr2.skip(Long.MAX_VALUE);
strLineNumber2 = String.valueOf(lnr2.getLineNumber());
lineNumber2 = Integer.parseInt(strLineNumber2);
//Closes the file reader and buffered reader
br1.close();
file_to_read.close();
} catch (IOException | NumberFormatException e) {
strLineNumber2 = "0";
}
//Adds the set name to the set name array
lblDeckName[row] = new JLabel (strSetName);
//Adds all buttons that will be used in the layout into a button array
JButton aryOptions [][] = new JButton [3][lineNumber];
//Defines and formats the Add Words button
JButton btnAddWords = new JButton("Add Words");
btnAddWords.setOpaque(false);
btnAddWords.setContentAreaFilled(false);
btnAddWords.setBorder(null);
btnAddWords.setBorderPainted(false);
//Defines and formats the Play button
JButton btnPlay = new JButton("Play");
btnPlay.setOpaque(false);
btnPlay.setContentAreaFilled(false);
btnPlay.setBorder(null);
btnPlay.setBorderPainted(false);
//Defines and formats the Delete Set button
JButton btnDelete = new JButton("Delete Set");
btnDelete.setOpaque(false);
btnDelete.setContentAreaFilled(false);
btnDelete.setBorder(null);
btnDelete.setBorderPainted(false);
//Adds each button to the array based on the number of sets
aryOptions [0][row] = btnAddWords;
aryOptions [1][row] = btnPlay;
aryOptions [2][row] = btnDelete;
//Formats the GridBagLayout (Spaces are for formatting purposes)
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = row;
layoutBackground.add(lblDeckName[row],gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 1;
gbc.gridy = row;
layoutBackground.add(new JLabel(" "),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx =2;
gbc.gridy = row;
layoutBackground.add(new JLabel (strSubjectName),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 3;
gbc.gridy = row;
layoutBackground.add(new JLabel(" "),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 4;
gbc.gridy = row;
layoutBackground.add(new JLabel(strLineNumber2),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 5;
gbc.gridy = row;
layoutBackground.add(new JLabel(" | "),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 6;
gbc.gridy = row;
layoutBackground.add(aryOptions[0][row],gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 7;
gbc.gridy = row;
layoutBackground.add(new JLabel(" | "),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 8;
gbc.gridy = row;
layoutBackground.add(aryOptions[1][row],gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 9;
gbc.gridy = row;
layoutBackground.add(new JLabel(" | "),gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 10;
gbc.gridy = row;
layoutBackground.add(aryOptions[2][row],gbc);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 11;
gbc.gridy = row;
layoutBackground.add(new JLabel(" |"),gbc);
//Creates an action event for the delete set button
btnDelete.addActionListener((ActionEvent a) -> {
//Finds the source of the button that was clicked
String strSource = String.valueOf(a.getSource());
String strSourceCut1 = strSource.substring(25,30);
//Finds the index of the button that was clicked
String [] aryIndex = strSourceCut1.split(",");
String strIndex = aryIndex[0];
try {
//Defines new file reader and buffered reader
FileReader file_to_read2 = new FileReader(path);
BufferedReader br2 = new BufferedReader(file_to_read2);
//Finds the numerical index of the button that was clicked
int intIndex = Integer.parseInt(strIndex)/16;
//Creates a counter to count line numbers
int counter = 0;
while((br2.readLine()) != null) {
counter ++;
if(intIndex == 0) { //If the index is the first option the normal try/catch returns null pointer, so a new try/catch had to be created
try {
//Finds the name of the set based on what button was clicked
String chosenDeck2 = br2.readLine();
String [] aryDeleteDeck = chosenDeck2.split(",");
deleteDeck = aryDeleteDeck[0];
//Closes the buffered reader and file reader
br2.close();
file_to_read2.close();
//Creates the path to the file that needs to be deleted
Path p2 = Paths.get("C:\\Users\\priceadria\\Desktop\\Words_" + deleteDeck + ".txt");
Files.delete(p2);
} catch (IOException e) {
JOptionPane.showMessageDialog(null, e);
}
} else if (counter == intIndex) {
//Reads the deck name based on the button that was clicked
String chosenDeck2 = br2.readLine();
//Splits the deck name from the subject
String [] aryDeleteDeck = chosenDeck2.split(",");
deleteDeck = aryDeleteDeck[0];
//Closes the buffered reader and file reader
br2.close();
file_to_read2.close();
//Gets the file that needs to be deleted
Path p1 = Paths.get("C:\\Users\\priceadria\\Desktop\\Words_" + deleteDeck + ".txt");
Files.delete(p1);
}
}
}
catch (HeadlessException | IOException | NumberFormatException e) {
JOptionPane.showMessageDialog(null, e);
}
});
//Creates an action event for the add words button
btnAddWords.addActionListener((ActionEvent a) -> {
//Finds the source of the button that was clicked
String strSource = String.valueOf(a.getSource());
String strSourceCut1 = strSource.substring(25,30);
//Finds the index of the button that was clicked
String [] aryIndex = strSourceCut1.split(",");
String strIndex = aryIndex[0];
try {
//Creates a new file reader and buffered reader
FileReader file_to_read3 = new FileReader(path);
BufferedReader br3 = new BufferedReader(file_to_read3);
//Finds the index value
int intIndex = Integer.parseInt(strIndex)/16;
//Creates a counter to count line numbers
int counter = 0;
while((br3.readLine()) != null) {
//Increases counter value by 1
counter ++;
if(intIndex == 0)
{
try {
//Reads the set and subject for the
String chosenDeck2 = br3.readLine();
//Splits the subject from the set
String [] aryDeck = chosenDeck2.split(",");
chosenDeck = aryDeck[0];
//Closes the buffered reader and file reader
br3.close();
file_to_read3.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
} else if (counter == intIndex) {
String chosenDeck2 = br3.readLine();
String [] aryDeck = chosenDeck2.split(",");
chosenDeck = aryDeck[0];
br3.close();
file_to_read3.close();
}
}
}
catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
//Opens the new words frame
frmWords s = new frmWords(deckName, newXPoint, newYPoint, chosenDeck);
s.setVisible(true);
});
}
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
エラーは止まりますが、理由は何ですか?私が見ることができるその読者を使用しているものは何もありません。そして私がそれを削除すると、テストファイルが他のプロセスによって使用されているというエラーが表示されます。これは私が想定できるのはbr1だけです。
私はこれが見苦しいかもしれないことを知っています。おそらくそれはコードが不適切だからかもしれませんが、本当に助けに感謝します。私は高校生です。
感謝:)
whileループでbr2を終了しているようです。これが複数回実行されるかどうかによって、これは問題になる可能性があります。 – MaxPower
br3と同じです。 – MaxPower
こちらをご覧ください。https://stackoverflow.com/questions/22900477/java-io-exception-stream-closed コードを関数に分割し、学習後に問題を再現するために最小限のコードで再現しようとすると、利益を得ることができます。 – Omrisk