更新了我的代码我意识到我应该拥有JButton上的actionListener（因为他们实际上正在做所有的工作）。我的逻辑现在已经在排序部分了。我能够让jButton交换值，但我的输出看起来是正确的，但我正在试图找出我搞砸了排序机制的地方。通过使用单选按钮选择一个起始点，并选择JButton交换的其他位置，该程序“应该”正常工作。 （例如，收音机3然后jbutton 8会将第3个元素移动到第8个位置）我知道我非常接近，但我已经把自己弄成了一个车辙而且看不出来。有什么指针吗？ （免责声明这是编程2作业的奖励积分。）
新代码
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class GUIswitch
{
public static void main(String[] args)
{
GUIswitchClass myWindow = new GUIswitchClass();
myWindow.setSize(300,350);
myWindow.setLocation(100,100);
myWindow.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
myWindow.setVisible( true );
}
}
//====================================================================================================================
class GUIswitchClass extends JFrame //fields
{
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
JPanel allPanel = new JPanel();
JRadioButton rdoBut[] = new JRadioButton[10];
JButton teamBut[] = new JButton[10];
ButtonGroup rdBtGp = new ButtonGroup();
String rdoButNum[] = {"1","2","3","4","5","6","7","8","9","10"};
String teamName[] = {"A","BB","CCC","DDDD","EEEEE","FFFFFF",
"GGGGGGG","HHHHHHHH","IIIIIIIII","JJJJJJJJJJ"};
//String from;
//String to;
int from;
int to;
String fromTo; //??
int i;
public GUIswitchClass() //constructor
{
super("Proj 3");
fromTo = setButs();
//to = teamBut[ teamName[i] ];
}
private String setButs()
{
int i;
leftPanel.setLayout(new GridLayout(10,1));
rightPanel.setLayout(new GridLayout(10,1));
for(i=0;i<10;i++)
{
rdoBut[i] = new JRadioButton(rdoButNum[i]);
rdoBut[i].setFont(new Font("Courier", Font.PLAIN, 30) );
rdBtGp.add(rdoBut[i]);
leftPanel.add(rdoBut[i]);
}
/*for(i=0;i<10;i++)
if(rdoBut[i].isSelected() )
{
from = Integer.parseInt(rdoBut[i].getText() );
}
*/
for(i=0;i<10;i++)
{
teamBut[i] = new JButton(teamName[i]);
teamBut[i].setFont(new Font("Courier", Font.PLAIN, 30) );
teamBut[i].setHorizontalAlignment(SwingConstants.LEFT);
teamBut[i].addActionListener(new checkHdlr() );
rightPanel.add(teamBut[i]);
}
allPanel.setLayout(new BorderLayout());
allPanel.add(leftPanel, BorderLayout.WEST);
allPanel.add(rightPanel, BorderLayout.CENTER);
add(allPanel);
return fromTo;
}
@SuppressWarnings("unused")
private class checkHdlr implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
//String userNum;
//userNum = event.getActionCommand();
for(i=0;i<10;i++)
if(rdoBut[i].isSelected() )
{
from = Integer.parseInt(rdoBut[i].getText() );
}
for(i=0;i<10;i++)
{
if(event.getSource() == teamBut[i])
{
//teamBut[i].
teamBut[i].setText(teamName[i]);
//to = (int)(teamBut[i]);
}
}
rightPanel.revalidate(); //refresh the panels
moveTeam(teamName, from, to);
}
}
//--------------------------------------------------------------------------
public void moveTeam(String teamName[],int from,int to)
{
//int from=0;
//int to=0;
if(from>to) //determine direction to move
moveUp(teamName,from,to);
else
moveDown(teamName,from,to);
}
//---------------------------------------------------------------------move up
public static void moveUp(String teamList[], int from, int to)
{
String clipboard;
int row;
clipboard = teamList[from]; //copy
for(row=from;row>to;row--) //shift others down
teamList[row] = teamList[row-1];
teamList[row] = clipboard; //paste
}
//-------------------------------------------------------------------move down
public static void moveDown(String teamList[], int from, int to)
{
String clipboard;
int row;
clipboard = teamList[from]; //copy
for(row=from;row<to;row++) //shift others up
teamList[row] = teamList[row+1];
teamList[row] = clipboard; //paste
}
}
旧代码
import java.awt.*;
import java.awt.event.*;
import java.util.StringTokenizer;
import javax.swing.*;
public class GUIswitch
{
public static void main(String[] args)
{
GUIswitchClass myWindow = new GUIswitchClass();
myWindow.setSize(300,350);
myWindow.setLocation(100,100);
myWindow.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
myWindow.setVisible( true );
}
}
//====================================================================================================================
class GUIswitchClass extends JFrame //fields
{
JPanel leftPanel = new JPanel();
JPanel rightPanel = new JPanel();
JPanel allPanel = new JPanel();
JRadioButton rdoBut[] = new JRadioButton[10];
JButton teamBut[] = new JButton[10];
ButtonGroup rdBtGp = new ButtonGroup();
String rdoButNum[] = {"1","2","3","4","5","6","7","8","9","10"};
String teamName[] = {"A","BB","CCC","DDDD","EEEEE","FFFFFF",
"GGGGGGG","HHHHHHHH","IIIIIIIII","JJJJJJJJJJ"};
String from;
String to;
String fromTo;
int i;
public GUIswitchClass() //constructor
{
super("Swap Elements");
fromTo = setButs();
//to = teamBut[teamName[i]];
}
private String setButs()
{
int i;
leftPanel.setLayout(new GridLayout(10,1));
rightPanel.setLayout(new GridLayout(10,1));
for(i=0;i<10;i++)
{
rdoBut[i] = new JRadioButton(rdoButNum[i]);
rdoBut[i].setFont(new Font("Courier", Font.PLAIN, 30) );
rdoBut[i].addActionListener(new checkHdlr() );
rdBtGp.add(rdoBut[i]);
leftPanel.add(rdoBut[i]);
}
for(i=0;i<10;i++)
{
teamBut [i] = new JButton(teamName[i]);
teamBut[i].setFont(new Font("Courier", Font.PLAIN, 30) );
teamBut[i].setHorizontalAlignment(SwingConstants.LEFT);
rightPanel.add(teamBut[i]);
}
allPanel.setLayout(new BorderLayout());
allPanel.add(leftPanel, BorderLayout.WEST);
allPanel.add(rightPanel, BorderLayout.CENTER);
add(allPanel);
return fromTo;
}
@SuppressWarnings("unused")
private class checkHdlr implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
String userNum;
userNum = event.getActionCommand();
}
}
//--------------------------------------------------------------------------
public static void moveTeam(String teamName[],String fromTo)
{
int from;
int to;
if(from>to) //determine direction to move
moveUp(teamName,from,to);
else
moveDown(teamName,from,to);
}
//---------------------------------------------------------------------move up
public static void moveUp(String teamList[], int from, int to)
{
String clipboard;
int row;
clipboard = teamList[from]; //copy
for(row=from;row>to;row--) //shift others down
teamList[row] = teamList[row-1];
teamList[row] = clipboard; //paste
}
//-------------------------------------------------------------------move down
public static void moveDown(String teamList[], int from, int to)
{
String clipboard;
int row;
clipboard = teamList[from]; //copy
for(row=from;row<to;row++) //shift others up
teamList[row] = teamList[row+1];
teamList[row] = clipboard; //paste
}
//---------------------------------------------------------------------display
public static void disp(String teamList[])
{
int r;
for(r=0;r<10;r++)
System.out.printf("%2d %s\n",r+1,teamList[r]);
}
}
答案 0 :(得分：4)
我不会交换JButton本身，而是提供JButton的AbstractActions并简单地交换这些动作，因为这是不可思议的更容易做到的。或者你可以交换JButton的文本和actionCommand（如果你要走这条路线，你应该做两件事），但这会涉及做并行交换，并且对我来说感觉不干净。
答案 1 :(得分：3)
我将JRadioButton替换为JCheckBox s，主要是因为您可以同时选择两个，并且允许以这种方式选中复选框更有意义允许单选按钮。
我会为所有复选框创建一个动作侦听器，因此每次单击都会通过它。
在动作监听器中，我会使用java.util.List来跟踪当前选择的选项（你可以走数组，但我发现这更简单）。
当列表包含两个项目时，我会......
Container.getComponentZOrder(Component) Container.getComponent(int) setComponentZOrder(Component, int) 有点像......
int index0 = leftPanel.getComponentZOrder(cb0);
int index1 = leftPanel.getComponentZOrder(cb1);
Component comp0 = rightPanel.getComponent(index0);
Component comp1 = rightPanel.getComponent(index1);
rightPanel.setComponentZOrder(comp0, index1);
rightPanel.setComponentZOrder(comp1, index0);
您还需要在框架上revalidate()更新布局;）