Question

java swing jcheckbox。。。

要求在确定与添加按钮中间加入一个文本框jtextfield，点击添加把文本框的内容添加到复选框cb中。
package test;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;

@SuppressWarnings(value="all")
public class Test4 extends JDialog{
private String[] str;
private JCheckBox[] cb;

public Test4(String[] str,JFrame f){
super(f,"挑选词",true);
this.str=str;
final List<String> cj = new ArrayList<String>();
JButton btnExit=new JButton("确定");
JButton btnAdd=new JButton("添加");
btnExit.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
setVisible(false);
for(int i=0;i<cb.length;i++){
if(cb[i].isSelected()){
System.out.println(cb[i].getText());
}
}
}
});
btnAdd.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){

}
});
JPanel pBottom=new JPanel();
pBottom.setLayout(new FlowLayout(FlowLayout.CENTER));
pBottom.add(btnExit);
pBottom.add(btnAdd);

cb=new JCheckBox[str.length];

JPanel p=new JPanel();
JScrollPane sp=new JScrollPane(p);
p.setLayout(new GridLayout(str.length/1,3));
int savei=0;
for(int i=0;i<str.length;i++){
cb[i]=new JCheckBox(str[i]);
cb[i].setSelected(true);
p.add(cb[i]);
}

add(sp,BorderLayout.CENTER);
add(pBottom,BorderLayout.SOUTH);
Dimension size=Toolkit.getDefaultToolkit().getScreenSize();
int x=(size.width-500)/2-100;
int y=(size.height-300)/2-100;
setBounds(x,y,550,450);
setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setVisible(true);
}

public static void main(String[] args) {
String str[]=new String[]{"1","2","3","4","5","6","7"};
new Test4(str,null);
}
}

Answer 1

需要将cb改为List 这样可以动态添加哈..

给你改了下..你看看哈.

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;

@SuppressWarnings(value = "all")
public class Test4 extends JDialog {
private String[] str;
private List<JCheckBox> cb;

public Test4(String[] str, JFrame f) {
super(f, "挑选词", true);
this.str = str;
final JPanel p = new JPanel();
final List<String> cj = new ArrayList<String>();
JButton btnExit = new JButton("确定");
final JTextField jf = new JTextField(20);
JButton btnAdd = new JButton("添加");
btnAdd.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JCheckBox jc = new JCheckBox(jf.getText());
p.add(jc);
cb.add(jc);
paintComponents(Test4.this.getGraphics());
}
});
btnExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < cb.size(); i++) {
if (cb.get(i).isSelected()) {
System.out.print(cb.get(i).getText() + " ");
}
}
}
});
btnAdd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {

}
});
JPanel pBottom = new JPanel();
pBottom.setLayout(new FlowLayout(FlowLayout.CENTER));
pBottom.add(btnExit);
pBottom.add(jf);
pBottom.add(btnAdd);

cb = new ArrayList<JCheckBox>();

JScrollPane sp = new JScrollPane(p);
p.setLayout(new GridLayout(str.length / 1, 3));
int savei = 0;
for (int i = 0; i < str.length; i++) {
cb.add(new JCheckBox(str[i]));
cb.get(i).setSelected(true);
p.add(cb.get(i));
}

add(sp, BorderLayout.CENTER);
add(pBottom, BorderLayout.SOUTH);
Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
int x = (size.width - 500) / 2 - 100;
int y = (size.height - 300) / 2 - 100;
setBounds(x, y, 550, 450);
setResizable(false);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setVisible(true);
}

public static void main(String[] args) {
String str[] = new String[] { "1", "2", "3", "4", "5", "6", "7" };
new Test4(str, null);
}
}

还有问题HI我哈..

Answer 2

代码真乱