[英]How do I pass arguments to the annotationProcessor in maven
[英]How do I pass arguments to/override ActionPerformed()
這是下面的代碼。 我在具有三個菜單的面板中創建了一個菜單欄,第一個是“添加信息”。 在添加信息中,我添加了三個菜單項:員工,商品和客戶。 單擊適當的菜單項后,表單應出現在包含菜單欄的原始面板下方的另一個面板中。 此表單應根據單擊哪個Menuitem來輸入“員工”,“商品”或“客戶”的信息。 填寫表單后,有一個提交按鈕(在表單內),單擊該按鈕應創建一個新窗口/彈出窗口/對話框,該窗口應打印在表單中輸入的詳細信息。 我的問題從第幾行開始。 216行號 225.當我單擊“客戶”菜單項的“ submit3”按鈕時,彈出窗口出現,但未顯示包含“ txt1”內容的字符串的內容。 如何將組件的值傳遞給actionPerformed,以便它可以在新的彈出窗口中打印它們?
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.TitledBorder;
public class Retail extends JFrame implements ActionListener
{
/**
*
*/
private static final long serialVersionUID = 1L;
JMenuBar menuBar = new JMenuBar();
JMenu addmenu = new JMenu("Add Information");
JMenu delmenu = new JMenu("Delete Information");
JMenu savemenu = new JMenu("Save Information");
JMenuItem emp = new JMenuItem("Employee");
JMenuItem merc = new JMenuItem("Merchandise");
JMenuItem cust = new JMenuItem("Customer");
Container contentPane = getContentPane();
JPanel p2 = new JPanel();
public Retail()
{
super();
contentPane.setLayout(new BorderLayout());
JPanel p1 = new JPanel();
p1.setBorder(new TitledBorder("Select Menu"));
p1.setPreferredSize(new Dimension(500, 100));
contentPane.add(p1,BorderLayout.NORTH);
p2.setBorder(new TitledBorder("Entry Screen"));
p2.setPreferredSize(new Dimension(500,500));
contentPane.add(p2,BorderLayout.CENTER);
p2.setLayout(new BorderLayout());
p1.add(menuBar);
menuBar.add(addmenu);
menuBar.add(delmenu);
menuBar.add(savemenu);
addmenu.add(emp);
addmenu.addSeparator();
addmenu.add(merc);
addmenu.addSeparator();
addmenu.add(cust);
addmenu.addSeparator();
emp.addActionListener(this);
merc.addActionListener(this);
cust.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
JButton submit1 = new JButton("Submit Employee Information");
JButton submit2 = new JButton("Submit Merchandise Information");
JButton submit3 = new JButton("Submit Customer Information");
if(e.getSource() == emp)
{
p2.removeAll();
p2.updateUI();
String[] states={"MA","AZ","CA"};
JLabel lb1 = new JLabel("First Name:");
JTextField txt1 = new JTextField(12);
JLabel lb2 = new JLabel("Last Name:");
JTextField txt2 = new JTextField(12);
JLabel lb3 = new JLabel("Address:");
JTextField txt3 = new JTextField(12);
JLabel lb4 = new JLabel("City:");
JTextField txt4 = new JTextField(12);
JLabel lb5 = new JLabel("State");
JComboBox cb1 = new JComboBox(states);
JLabel lb6 = new JLabel("ZipCode");
JTextField txt5 = new JTextField(12);
JPanel p3 = new JPanel();
p3.setLayout(new GridLayout(8,1));
JPanel p4 = new JPanel();
p4.setLayout(new GridLayout(1,2));
JLabel lb7= new JLabel("Gender:");
JRadioButton rb1 = new JRadioButton("Male");
JRadioButton rb2 = new JRadioButton("Female");
ButtonGroup bgroup = new ButtonGroup();
bgroup.add(rb1);
bgroup.add(rb2);
JLabel lb8 = new JLabel("Submit Information:");
JPanel p5 = new JPanel();
p5.setLayout(new GridLayout(8,1));
p3.add(lb1);
p3.add(lb2);
p3.add(lb3);
p3.add(lb4);
p3.add(lb5);
p3.add(lb6);
p3.add(lb7);
p3.add(lb8);
p5.add(txt1);
p5.add(txt2);
p5.add(txt3);
p5.add(txt4);
p4.add(rb1);
p4.add(rb2);
p5.add(cb1);
p5.add(txt5);
p5.add(p4);
p5.add(submit1);
p2.add(p3,BorderLayout.WEST);
p2.add(p5,BorderLayout.EAST);
submit1.addActionListener(this);
}
if(e.getSource() == merc)
{
p2.removeAll();
p2.updateUI();
String[] states={"MA","AZ","CA"};
JLabel lb1 = new JLabel("First Name:");
JTextField txt1 = new JTextField(12);
JLabel lb2 = new JLabel("Last Name:");
JTextField txt2 = new JTextField(12);
JLabel lb3 = new JLabel("Address:");
JTextField txt3 = new JTextField(12);
JLabel lb4 = new JLabel("City:");
JTextField txt4 = new JTextField(12);
JLabel lb5 = new JLabel("State");
JComboBox cb1 = new JComboBox(states);
JLabel lb6 = new JLabel("ZipCode");
JTextField txt5 = new JTextField(12);
JPanel p3 = new JPanel();
p3.setLayout(new GridLayout(8,1));
JPanel p4 = new JPanel();
p4.setLayout(new GridLayout(1,2));
JLabel lb7= new JLabel("Gender");
JRadioButton rb1 = new JRadioButton("Male");
JRadioButton rb2 = new JRadioButton("Female");
JLabel lb8 = new JLabel("Submit Information:");
JPanel p5 = new JPanel();
p5.setLayout(new GridLayout(8,1));
p3.add(lb1);
p3.add(lb2);
p3.add(lb3);
p3.add(lb4);
p3.add(lb5);
p3.add(lb6);
p3.add(lb7);
p3.add(lb8);
p5.add(txt1);
p5.add(txt2);
p5.add(txt3);
p5.add(txt4);
p4.add(rb1);
p4.add(rb2);
p5.add(cb1);
p5.add(txt5);
p5.add(p4);
p5.add(submit2);
p2.add(p3,BorderLayout.WEST);
p2.add(p5,BorderLayout.EAST);
submit2.addActionListener(this);
}
if(e.getSource() == cust)
{
p2.removeAll();
p2.updateUI();
String[] states={"MA","AZ","CA"};
JLabel lb1 = new JLabel("First Name:");
JTextField txt1 = new JTextField(12);
JLabel lb2 = new JLabel("Last Name:");
JTextField txt2 = new JTextField(12);
JLabel lb3 = new JLabel("Address:");
JTextField txt3 = new JTextField(12);
JLabel lb4 = new JLabel("City:");
JTextField txt4 = new JTextField(12);
JLabel lb5 = new JLabel("State");
JComboBox cb1 = new JComboBox(states);
JLabel lb6 = new JLabel("ZipCode");
JTextField txt5 = new JTextField(12);
JPanel p3 = new JPanel();
p3.setLayout(new GridLayout(8,1));
JPanel p4 = new JPanel();
p4.setLayout(new GridLayout(1,2));
JLabel lb7= new JLabel("Gender");
JRadioButton rb1 = new JRadioButton("Male");
JRadioButton rb2 = new JRadioButton("Female");
JLabel lb8 = new JLabel("Submit Information:");
JPanel p5 = new JPanel();
p5.setLayout(new GridLayout(8,1));
p3.add(lb1);
p3.add(lb2);
p3.add(lb3);
p3.add(lb4);
p3.add(lb5);
p3.add(lb6);
p3.add(lb7);
p3.add(lb8);
p5.add(txt1);
p5.add(txt2);
p5.add(txt3);
p5.add(txt4);
p4.add(rb1);
p4.add(rb2);
p5.add(cb1);
p5.add(txt5);
p5.add(p4);
p5.add(submit3);
p2.add(p3,BorderLayout.WEST);
p2.add(p5,BorderLayout.EAST);
final String s;
s = txt1.getText();
submit3.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent args0)
{
JOptionPane.showMessageDialog(rootPane,s);
}
});
}
}
public static void main(String[] args)
{
Retail frame = new Retail();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Retail Information");
frame.pack();
frame.setResizable(true);
frame.setVisible(true);
}
}
您的代碼有幾個問題,但是問題的根源是創建String的時間。 創建它是在創建要顯示的JPanel時創建的,而不是在按下提交按鈕時創建的。 一種快速的權宜之計是將您的JTextFields定為最終文本,然后在提交JButton的ActionListener中從其中提取文本。
例如,
if (e.getSource() == cust) {
p2.removeAll();
p2.updateUI();
String[] states = { "MA", "AZ", "CA" };
JLabel lb1 = new JLabel("First Name:");
final JTextField txt1 = new JTextField("Foo", 12);
// ....
// final String s;
// s = txt1.getText();
submit3.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent args0) {
String s = txt1.getText();
JOptionPane.showMessageDialog(rootPane, s);
}
});
}
話雖如此,如果這是我的代碼,我將使用更好的總體計划進行重新設計。
建議包括:
也許您可以將JTextField txt1
實例變量,這意味着您將其放在類范圍變量中,而不是將JTextField txt1
放在actionPerformedMethod
內,您可以像這樣移動聲明:
public class Retail extends JFrame implements ActionListener
{
private JTextField txt1 = new JTextField(12);
現在您可以像這樣引用txt1
submit3.addActionListener(new ActionListener()
{
@Override
public void actionPerformed(ActionEvent args0)
{
String text = Retail.this.txt1.getText();
JOptionPane.showMessageDialog(rootPane,s);
}
});
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