자바 JButton 이용해서 BufferedWriter 기능 넣기 error

Question

public static void main(String[] args) { new Test(); } } class Test extends JFrame implements ActionListener { JButton btn1 &#61; null; JButton btn2 &#61; null; JButton btn3 &#61; null; JButton btn4 &#61; null; JButton btn5 &#61; null; JTable table &#61; null; public Test() { super(&#34;학생관리 프로그램&#34;); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); this.setBounds(200, 200, 500, 500); this.setLayout(new FlowLayout()); JMenuBar menuBar &#61; new JMenuBar(); JMenu fileMenu &#61; new JMenu(&#34;파일&#34;); JMenu editMenu &#61; new JMenu(&#34;편집&#34;); JMenuItem newItem &#61; new JMenuItem(&#34;새 문서&#34;); JMenuItem openItem &#61; new JMenuItem(&#34;열기&#34;); JMenuItem saveItem &#61; new JMenuItem(&#34;저장&#34;); JMenuItem closeItem &#61; new JMenuItem(&#34;닫기&#34;); setJMenuBar(menuBar); menuBar.add(fileMenu); menuBar.add(editMenu); fileMenu.add(newItem); fileMenu.add(openItem); fileMenu.add(saveItem); fileMenu.addSeparator(); fileMenu.add(closeItem); saveItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { //저장 try { BufferedWriter bw &#61; new BufferedWriter(new FileWriter(&#34;test.txt&#34;)); for (int i &#61; 0; i < table.getRowCount(); i&#43;&#43;) { for (int j &#61; 0; j < table.getColumnCount(); j&#43;&#43;) { if(table.getValueAt(i, j) !&#61; null) { bw.write((String)table.getValueAt(i, j)); bw.write(&#34;,&#34;); } } bw.newLine(); } bw.flush(); bw.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } });여기 bufferedwriter 코드 어디가 잘못되서 에러가 나는건지 알수 있을까요

자바 JButton 이용해서 BufferedWriter 기능 넣기 error

0개의 답변

#jbutton 목록