按下一个按钮，在java的新窗口中打开一个文件

我已经创建了一个JFrame和一个文本字段和按钮。在文本字段中我已经从文本文件中读取了一个名称。我想要点击按钮并打开一个知道窗口，我想在其中输入名称+其他信息来自同一个文件。

这是我的代码：这是我的主框架

package Frontend; import Business.ShowDetails; import model.*; import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import javax.swing.*; public class Gui { //String file=" "; private JFrame frame; private JPanel panel1 ; private JPanel panel2; private JPanel panel; private JTextField nume1; private JTextField nume2; private JTextField nume3; private JTextField nume4; private JTextField nume5; private JButton edit1; private JButton edit2; private JButton edit3; private JButton edit4; private JButton edit5; private final String file = "Persoane.txt"; public Gui(){ fereastra(); readFile(file); } public void fereastra(){ frame = new JFrame(); panel = new JPanel(new FlowLayout()); panel1 = new JPanel(new GridLayout(5,2,1,7)); panel2 = new JPanel(new GridLayout(5,2,1,1)); nume1 = new JTextField(15); nume2 = new JTextField(15); nume3 = new JTextField(15); nume4 = new JTextField(15); nume5 = new JTextField(15); edit1 = new JButton("Edit"); edit2 = new JButton("Edit"); edit3 = new JButton("Edit"); edit4 = new JButton("Edit"); edit5 = new JButton("Edit"); panel1.add(nume1); panel2.add(edit1); panel1.add(nume2); panel2.add(edit2); panel1.add(nume3); panel2.add(edit3); panel1.add(nume4); panel2.add(edit4); panel1.add(nume5); panel2.add(edit5); ButtonHandler handler = new ButtonHandler(); edit1.addActionListener(handler); edit2.addActionListener(handler); panel.add(panel1); panel.add(panel2); frame.add(panel); frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE); frame.setSize(300, 200); frame.setVisible(true); } public String readFile(String filename){ try{ String line=""; Persoana p ; BufferedWriter bw = null; ArrayList listOfPersons; //creez o lista de persoane listOfPersons = new ArrayList(); //citesc fisierul Persoane.txt FileReader file1 =new FileReader(filename); BufferedReader br1 = new BufferedReader(file1); while((line = br1.readLine())!= null){ //elimin prima linie din fisier if(!line.trim().contains("ID")){ String[] attributes = line.split(";");// separ fiecare linie in tokenuri p = new Persoana(); // make a new person p.setId(Integer.parseInt(attributes[0])); p.setNume(attributes[1]); p.setPrenume(attributes[2]); p.setDataNasterii(attributes[3]); p.setProfesie(attributes[4]); listOfPersons.add(p); } } int i = 0; while (i < listOfPersons.size()){ if(i == 0){ p = listOfPersons.get(i); nume1.setText(p.getNume() + " " +p.getPrenume()); nume1.getText(); } if(i == 1){ p = listOfPersons.get(i); nume2.setText(p.getNume() + " " +p.getPrenume()); nume2.getText(); } if(i == 2){ p = listOfPersons.get(i); nume3.setText(p.getNume() + " " +p.getPrenume()); nume3.getText(); } if(i == 3){ p = listOfPersons.get(i); nume4.setText(p.getNume() + " " +p.getPrenume()); nume4.getText(); } if(i == 4){ p = listOfPersons.get(i); nume5.setText(p.getNume() + " " +p.getPrenume()); nume5.getText(); } i++; } br1.close(); } catch(IOException ex){ System.out.println("Error opening file."); System.exit(1); } return file; } // inner class for button event handling private class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { if (e.getSource() == edit1) { new ShowDetails(); } if (e.getSource() == edit2) { new ShowDetails(); } } } } 

这是我的第二个cclass：

  package Business; import Frontend.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class ShowDetails extends JFrame{ Gui gui; public ShowDetails(){ this.gui = gui; fereastra(); } public void fereastra(){ JPanel panel = new JPanel(new GridLayout(2, 2)); JTextArea text = new JTextArea(); text.setEditable(true); text.setText(gui.readFile("Persoane.txt")); text.getText(); panel.add(text); getContentPane().add(panel); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //setLocation(50,50); setSize(300,200); setResizable(false); // setVisible(true); show(); } } 

Answer 1

1. 如果您希望弹出窗口将JDialog与框架的父级一起使用，则不要创建新的JFrame 。
2. 不要使用show(); ，因为这是长时间折旧的方法，删除那个和未注释的// setVisible(true);
3. 为什么两个JButtons做同样的事情？
4. 为什么使用FileIO将值或参数从一个Object传递给另一个？
5. 我建议使用CardLayout而不是创建一个弹出窗口。
6. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 从class ShowDetails将关闭当前的JVM实例。
7. 不要扩展JFrame或JDialog或JWindow