[英]how to pass a variable from one JFrame to another
I have two JFrames
newAccessLevels.java , which has two buttons "Level 1" "Level 2" and newAccessPanel.java I need to get the level that the user selects "1 or 2" onto the accessPanel
so I can display it in the title of the accessPanel.java eg Access Level 1, Access Level 2. How can this be done. 我有两个JFrames
newAccessLevels.java,其中有两个按钮“层次1”“层次2”和newAccessPanel.java我需要获得用户选择电平“1或2”到accessPanel
所以我可以在标题显示它accessPanel.java的示例,例如访问级别1,访问级别2。如何完成此操作。 below is example code, so if level 1 is clicked the newAccessPanel JFrame will open with the title * ACCESS LEVEL 1 and vice versa for level 2: 下面是示例代码,因此,如果单击级别1,则将打开标题为* ACCESS LEVEL 1的newAccessPanel JFrame,反之亦然:
newAccessLevels.java newAccessLevels.java
package securitySystem;
import java.awt.*;
import javax.swing.*;
import java.sql.*;
import java.awt.event.*;
public class newAccessLevels extends JFrame{
public static void main (String args[]){
newAccessLevels gui= new newAccessLevels ();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setTitle("Access Levels");
gui.setSize(400,400);
gui.setLocationRelativeTo(null);
gui.setVisible(true);
}
JButton btnLevel1= new JButton("Levels 1");
JButton btnLevel2= new JButton("Level 2");
public newAccessLevels (){
setLayout (null);
btnLevel1.setBounds(120,70, 150, 30);
add(btnLevel1);
btnLevel2.setBounds(120,130, 150, 30);
add(btnLevel2);
}
public void calcButtons()
{
btnLevel1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newAccessPanel gui =new newAccessPanel();
gui.setSize (360, 450);
gui.setLocationRelativeTo(null);
gui.setVisible(true);
dispose();
}
});
btnLevel2.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
newAccessPanel gui =new newAccessPanel();
gui.setSize (360, 450);
gui.setLocationRelativeTo(null);
gui.setVisible(true);
dispose();
}
});
}
} }
newAccessPanel.java newAccessPanel.java
package securitySystem;
import java.awt.*;
import javax.swing.*;
import java.sql.*;
import java.awt.event.*;
public class newAccessPanel extends JFrame{
public static void main (String args[]){
newAccessPanel gui= new newAccessPanel ();
gui.setSize (360, 450);
gui.setLocationRelativeTo(null);
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.setVisible(true);
gui.setTitle("ACCESS LEVEL '1/2'");
//gui.setLayout(new BorderLayout());
//gui.setBackground(Color.BLACK);
}
} }
Hi this is an approach of how you can do it, simply you need to construct a new JFrame with a constructor that recives the parameter you need. 嗨,这是一种实现方法,您只需要用构造函数构造一个新的JFrame即可获取所需的参数。
First JFrame, where there are the buttons 第一个JFrame,有按钮
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JButton;
public class Frame1 extends JFrame{
private String mensaje;
private JButton btnHola;
private JButton btnAdios;
public Frame1() {
getContentPane().setLayout(null);
btnHola = new JButton("Hello");
btnHola.setBounds(63, 210, 89, 23);
getContentPane().add(btnHola);
btnHola.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
mensaje = Frame1.this.btnHola.getText();
Frame2 frame2 = new Frame2(mensaje);
}
});
btnAdios = new JButton("Bye");
btnAdios.setBounds(245, 210, 89, 23);
getContentPane().add(btnAdios);
btnAdios.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
mensaje = Frame1.this.btnAdios.getText();
Frame2 frame2 = new Frame2(mensaje);
}
});
}
public static void main(String[] args) {
Frame1 frame = new Frame1();
frame.setVisible(true);
}
}
Second JFrame, where the message is received. 第二个JFrame,在其中接收消息。
import javax.swing.JFrame;
public class Frame2 extends JFrame {
public Frame2(String message) {
super();
setVisible(true);
setTitle(message);
}
}
I hope this help you. 希望对您有所帮助。 Greetings! 问候!
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