[英]Click a button to open a new JFrame / GUI,
I seem to not be able to find a way to get my code to work.我似乎无法找到让我的代码工作的方法。 I am making a program and until now everything was working, i have some buttons and they do what they should.
我正在制作一个程序,直到现在一切正常,我有一些按钮,他们做他们应该做的。 But now i added a button that when a user click it, it should close the current GUI and open a new one.
但是现在我添加了一个按钮,当用户单击它时,它应该关闭当前的 GUI 并打开一个新的。 I also want to point out that i created a new class for this new GUI.
我还想指出,我为这个新的 GUI 创建了一个新的 class。
The other GUI class that i want to call is the GuiCrafting , in that class the GUI is also all coded, and works if i call it on the Main .我想调用的另一个 GUI class 是GuiCrafting ,在 class 中,GUI 也全部编码,如果我在Main上调用它就可以工作。
My question is what do i type here (I tried a lot of things like dispose() etc but i just get error messages):我的问题是我在这里输入什么(我尝试了很多诸如 dispose() 之类的东西,但我只是收到错误消息):
public void actionPerformed(ActionEvent event) {
if( str.equals("Crafting")){
//insert code to call the GuiCrafting class and open his GUI
}
Thanks in advance and if you need something more please let me know.在此先感谢您,如果您需要更多信息,请告诉我。
Multiple JFrame
s are frowned upon as you can read about here and here多个
JFrame
不受欢迎,您可以在此处和此处阅读
Perhaps what you want to use is a CardLayout which manages two or more components (usually JPanel
instances) that share the same display space.也许您想要使用的是CardLayout ,它管理共享相同显示空间的两个或多个组件(通常是
JPanel
实例)。
After clicking the button "Goto Card 2"点击“Goto Card 2”按钮后
TestApp.java: TestApp.java:
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.event.ActionEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class TestApp {
final static String CARD1 = "Card1";
final static String CARD2 = "Card2";
public TestApp() {
initComponents();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(TestApp::new);
}
private void initComponents() {
JFrame frame = new JFrame("TestApp");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// create the panel that contains the "cards".
JPanel cards = new JPanel(new CardLayout());
// card 1 components
JButton buttonGotoCard2 = new JButton("Goto Card 2");
buttonGotoCard2.addActionListener((ActionEvent e) -> {
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, CARD2);
});
// create card 1
JPanel card1 = new JPanel();
card1.add(new JLabel("Card 1"));
card1.add(buttonGotoCard2);
// card 2 components
JButton buttonGotoCard1 = new JButton("Goto Card 1");
buttonGotoCard1.addActionListener((ActionEvent e) -> {
CardLayout cl = (CardLayout) (cards.getLayout());
cl.show(cards, CARD1);
});
// create card 2
JPanel card2 = new JPanel();
card2.add(new JLabel("Card 2"));
card2.add(buttonGotoCard1);
// add cards to cards panel
cards.add(card1, CARD1);
cards.add(card2, CARD2);
frame.getContentPane().add(cards, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}
There is also a JDialog which could be what you want.还有一个JDialog可能是您想要的。
HOWEVER然而
You can easily do something like that (Open a JFrame
from another If you must ):您可以轻松地执行类似的操作(如果必须,从另一个打开
JFrame
):
TestApp.java: TestApp.java:
import java.awt.event.ActionEvent;
import java.awt.event.WindowAdapter;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.EmptyBorder;
public class TestApp {
public TestApp() {
initComponents();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(TestApp::new);
}
private void initComponents() {
JFrame mainFrame = new JFrame();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.setBorder(new EmptyBorder(10, 10, 10, 10));
JLabel label = new JLabel("JFrame 1");
JButton button = new JButton("Open JFrame 2");
button.addActionListener((ActionEvent e) -> {
this.showNewJFrame(new WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent e) {
// here we listen for the second JFrame being closed so we can bring back the main JFrame
mainFrame.setVisible(true);
}
});
// hide the main JFrame
mainFrame.setVisible(false);
});
panel.add(label);
panel.add(button);
mainFrame.add(panel);
mainFrame.pack();
mainFrame.setVisible(true);
}
private void showNewJFrame(WindowAdapter windowAdapter) {
JFrame frame2 = new JFrame();
frame2.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); // we dont wnat to exit when this JFrame is closed
JPanel panel2 = new JPanel();
panel2.setLayout(new BoxLayout(panel2, BoxLayout.Y_AXIS));
panel2.setBorder(new EmptyBorder(10, 10, 10, 10));
JLabel label2 = new JLabel("JFrame 2");
panel2.add(label2);
frame2.add(panel2);
frame2.addWindowListener(windowAdapter);
frame2.pack();
frame2.setVisible(true);
}
}
This produces:这会产生:
and when the "Open JFrame 2" is clicked:当点击“打开 JFrame 2”时:
and when JFrame 2 is closed it brings back the main JFrame
via the WindowAdapter#windowClosing
.当JFrame 2关闭时,它通过
WindowAdapter#windowClosing
带回主要的JFrame
。
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