Java 如何从JFrame表单获取输入?
我试图获取以JFrame表单提交的输入,并将其存储在arraylist中。当ActionEvent发生时,我不知道如何获取我在文本字段中输入的内容。有人能告诉我怎么做吗 我的表单当前看起来像 这是我的密码:Java 如何从JFrame表单获取输入?,java,swing,jframe,jtextfield,springlayout,Java,Swing,Jframe,Jtextfield,Springlayout,我试图获取以JFrame表单提交的输入,并将其存储在arraylist中。当ActionEvent发生时,我不知道如何获取我在文本字段中输入的内容。有人能告诉我怎么做吗 我的表单当前看起来像 这是我的密码: public class SpringDemo { private static void createAndShowGUI() { final String[] labels = {"Bill: ", "Last Top Up Date: ", "Same Netw
public class SpringDemo {
private static void createAndShowGUI() {
final String[] labels = {"Bill: ", "Last Top Up Date: ", "Same Network? "};
int labelsLength = labels.length;
//Create and populate the panel.
JPanel p = new JPanel(new SpringLayout());
for (int i = 0; i < labelsLength; i++) {
JLabel l = new JLabel(labels[i], JLabel.TRAILING);
p.add(l);
JTextField textField = new JTextField(10);
l.setLabelFor(textField);
p.add(textField);
}
JButton button = new JButton("Submit");
p.add(new JLabel());
p.add(button);
//Lay out the panel.
SpringUtilities.makeCompactGrid(p,
labelsLength + 1, 2, //rows, cols
7, 7, //initX, initY
7, 7); //xPad, yPad
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//Execute when button is pressed
System.out.println("Test");
}
});
//Create and set up the window.
JFrame frame = new JFrame("SpringForm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
p.setOpaque(true); //content panes must be opaque
frame.setContentPane(p);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
公共类SpringDemo{
私有静态void createAndShowGUI(){
最终字符串[]标签={“账单:”,“上次充值日期:”,“相同网络?”};
int labelsLength=labels.length;
//创建并填充面板。
JPanel p=newjpanel(newspringlayout());
for(int i=0;i
您只需使用
textField.getText();
除非我错了
老实说,虽然这可能不适用于每个人,但我只会将它们作为单独的文本字段,而不是通过for循环创建新的文本字段
JTextField a = new JTextField();
and so on.....
你只需要
textField.getText();
除非我错了
老实说,虽然这可能不适用于每个人,但我只会将它们作为单独的文本字段,而不是通过for循环创建新的文本字段
JTextField a = new JTextField();
and so on.....
为此,您的
createAndShowGUI
方法应如下所示:private static void createAndShowGUI() {
final String[] labels = {"Bill: ", "Last Top Up Date: ", "Same Network? "};
int labelsLength = labels.length;
final JTextField[] textField = new JTextField[labels.length];
//Create and populate the panel.
JPanel p = new JPanel(new SpringLayout());
for (int i = 0; i < labelsLength; i++) {
JLabel l = new JLabel(labels[i], JLabel.TRAILING);
p.add(l);
textField[i] = new JTextField(10);
l.setLabelFor(textField[i]);
p.add(textField[i]);
}
JButton button = new JButton("Submit");
p.add(new JLabel());
p.add(button);
//Lay out the panel.
SpringUtilities.makeCompactGrid(p,
labelsLength + 1, 2, //rows, cols
7, 7, //initX, initY
7, 7); //xPad, yPad
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
for (int i = 0 ; i < labels.length ; i++)
{
System.out.println(labels[i]+"->"+textField[i].getText());
}
}
});
//Create and set up the window.
JFrame frame = new JFrame("SpringForm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
p.setOpaque(true); //content panes must be opaque
frame.setContentPane(p);
//Display the window.
frame.pack();
frame.setVisible(true);
}
private static void createAndShowGUI(){
最终字符串[]标签={“账单:”,“上次充值日期:”,“相同网络?”};
int labelsLength=labels.length;
最终JTextField[]textField=新的JTextField[labels.length];
//创建并填充面板。
JPanel p=newjpanel(newspringlayout());
for(int i=0;i”+textField[i].getText());
}
}
});
//创建并设置窗口。
JFrame框架=新JFrame(“SpringForm”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//设置内容窗格。
p、 set不透明(true);//内容窗格必须不透明
frame.setContentPane(p);
//显示窗口。
frame.pack();
frame.setVisible(true);
}
要执行此操作,您的createAndShowGUI
方法应如下所示:private static void createAndShowGUI() {
final String[] labels = {"Bill: ", "Last Top Up Date: ", "Same Network? "};
int labelsLength = labels.length;
final JTextField[] textField = new JTextField[labels.length];
//Create and populate the panel.
JPanel p = new JPanel(new SpringLayout());
for (int i = 0; i < labelsLength; i++) {
JLabel l = new JLabel(labels[i], JLabel.TRAILING);
p.add(l);
textField[i] = new JTextField(10);
l.setLabelFor(textField[i]);
p.add(textField[i]);
}
JButton button = new JButton("Submit");
p.add(new JLabel());
p.add(button);
//Lay out the panel.
SpringUtilities.makeCompactGrid(p,
labelsLength + 1, 2, //rows, cols
7, 7, //initX, initY
7, 7); //xPad, yPad
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
for (int i = 0 ; i < labels.length ; i++)
{
System.out.println(labels[i]+"->"+textField[i].getText());
}
}
});
//Create and set up the window.
JFrame frame = new JFrame("SpringForm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set up the content pane.
p.setOpaque(true); //content panes must be opaque
frame.setContentPane(p);
//Display the window.
frame.pack();
frame.setVisible(true);
}
private static void createAndShowGUI(){
最终字符串[]标签={“账单:”,“上次充值日期:”,“相同网络?”};
int labelsLength=labels.length;
最终JTextField[]textField=新的JTextField[labels.length];
//创建并填充面板。
JPanel p=newjpanel(newspringlayout());
for(int i=0;i”+textField[i].getText());
}
}
});
//创建并设置窗口。
JFrame框架=新JFrame(“SpringForm”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//设置内容窗格。
p、 set不透明(true);//内容窗格必须不透明
frame.setContentPane(p);
//显示窗口。
frame.pack();
frame.setVisible(true);
}
在列表中保留JTextField
s,并在操作侦听器中引用它们
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SpringLayout;
public class SpringDemo {
private static void createAndShowGUI() {
final String[] labels = { "Bill: ", "Last Top Up Date: ",
"Same Network? " };
int labelsLength = labels.length;
final List<JTextField> textFields = new ArrayList<JTextField>();
// Create and populate the panel.
JPanel p = new JPanel(new SpringLayout());
for (int i = 0; i < labelsLength; i++) {
JLabel l = new JLabel(labels[i], JLabel.TRAILING);
p.add(l);
JTextField textField = new JTextField(10);
textFields.add(textField);
l.setLabelFor(textField);
p.add(textField);
}
JButton button = new JButton("Submit");
p.add(new JLabel());
p.add(button);
// Lay out the panel.
SpringUtilities.makeCompactGrid(p, labelsLength + 1, 2, // rows, cols
7, 7, // initX, initY
7, 7); // xPad, yPad
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// Execute when button is pressed
System.out.println("Test");
for (JTextField jTextField : textFields) {
String s = jTextField.getText();
}
}
});
// Create and set up the window.
JFrame frame = new JFrame("SpringForm");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Set up the content pane.
p.setOpaque(true); // content panes must be opaque
frame.setContentPane(p);
// Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java