我正在开发一个GUI（这个社区到目前为止一直非常有帮助），我已经达到了我需要实现的另一个重要步骤。
目前我的GUI由JOptionsPane组成。在此窗格中是一个包含两个列表和四个按钮的面板。其中两个按钮是箭头，其中的文字是＆＃34;＆gt;＆＃34;和＆＃34;＆lt;＆＃34;。 （按钮位于两个列表之间。）
这些按钮正常工作。用户可以从第一个列表中选择一个对象，然后单击＆gt;它将移至第二个列表，反之亦然。
接下来我需要添加一个功能，其中有一个＆＃34;＆gt;＆gt;＆＃34;按钮。这会将第一个列表中的所有项目移动到第二个列表。我真的不知道如何处理这部分。我假设它是某种类型的while循环，虽然我并不完全确定。
首先允许我发布显示＆gt;的简单snipplet按钮。
buttonin = new JButton(" > ");
buttonin.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
int[] fromindex = outputDetails.getSelectedIndices();
Object[] from = outputDetails.getSelectedValues();
for(int i=0; i< from.length; i++){
output.addElement(from[i]);
System.out.println(output);
}
for(int i = (fromindex.length-1); i>=0; i--){
input.remove(fromindex[i]);
}
}
});
接下来，我将发布完整的代码，以便了解我想要实现的目标。我希望这是足够的信息，有人可以帮助我，如果不是我道歉，实际的程序很长，我想不出一个简单的方法来隔离这个测试用例。
public static void displayGUI(){
int result = JOptionPane.showOptionDialog(null, getPanel(),"JOptionPane Example : ", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE, null, new String[]{"Confirm","Create Return"}, "default");
if(result == 1){
initialScreenDecisions="NONE";
MainWriter.finishedCounter=true;
System.out.println(MainWriter.finishedCounter);
while(MainWriter.entryDetails.size()>0){
MainWriter.entryDetails.remove(0);
}
while(output.size()>0){
output.remove(0);
}
}
}
private static JPanel getPanel(){
JPanel panel = new JPanel();
JPanel panelTop = new JPanel();
JPanel topButtons = new JPanel();
JPanel bottomButtons = new JPanel();
String text = "<html>"
+"Batch <font size=6 color=>"+MainWriter.batchHeaderCounter+"</font> of <font size=6>"+BatchCounter.BatchTotal+"</font>"
+"<br>Batch Header: <font size=5><font color=red>"+MainWriter.BatchHeader+"</font>"
+"</html>";
JLabel topLabel = new JLabel(text);
panelTop.add(topLabel);
input = new DefaultListModel();
output = new DefaultListModel();
String[] shoppingItems = new String[MainWriter.entryDetails.size()];
shoppingItems = MainWriter.entryDetails.toArray(shoppingItems);
for(int i = 0; i < shoppingItems.length; i++){
input.addElement(shoppingItems[i]);
}
outputDetails = new JList(input);
outputDetails.setVisibleRowCount(10);
outputDetails.setFixedCellHeight(20);
outputDetails.setFixedCellWidth(400);
outputDetails.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
JScrollPane list1 = new JScrollPane(outputDetails);
inputDetails = new JList(output);
inputDetails.setVisibleRowCount(10);
inputDetails.setFixedCellHeight(20);
inputDetails.setFixedCellWidth(400);
inputDetails.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
JScrollPane list2 = new JScrollPane(inputDetails);
JPanel buttonPanel = new JPanel();
buttonin = new JButton(" > ");
buttonin.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
int[] fromindex = outputDetails.getSelectedIndices();
Object[] from = outputDetails.getSelectedValues();
for(int i=0; i< from.length; i++){
output.addElement(from[i]);
System.out.println(output);
}
for(int i = (fromindex.length-1); i>=0; i--){
input.remove(fromindex[i]);
}
}
});
buttonPanel.add(buttonin);
buttonout = new JButton(" < ");
buttonout.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
Object[] to = inputDetails.getSelectedValues();
int[] toindex = inputDetails.getSelectedIndices();
for(int i = 0; i < to.length; i++){
input.addElement(to[i]);
}
for(int i = (toindex.length-1); i >=0; i--){
output.remove(toindex[i]);
}
}
});
buttonall = new JButton(" >> ");
buttonall.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
if(initialScreenDecisions.equals("DEFAULT")){
JOptionPane.showMessageDialog(null, "You have selected to add all entry details. Please " +
"\nclick okay on the next scren to confirm or click " +
"\n'>>' again to cancel the apply all option.");
initialScreenDecisions="ADDALL";
}else if(initialScreenDecisions.equals("ADDALL")){
JOptionPane.showMessageDialog(null, "You have canceled the apply all option.");
initialScreenDecisions="DEFAULT";
}else{
JOptionPane.showMessageDialog(null, "You must disable the '<<' option before you can use this.");
}
}
});
buttonnone = new JButton(" << ");
buttonnone.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
if(initialScreenDecisions.equals("DEFAULT")){
JOptionPane.showMessageDialog(null, "You have selected to skip the current batch and" +
"\nomit all of it's entries. Click okay on the next" +
"\nscreen to confirm or click '<<' again to" +
"\ncancel the option.");
initialScreenDecisions="NONE";
}else if(initialScreenDecisions.equals("NONE")){
JOptionPane.showMessageDialog(null, "You have canceled the omit all option.");
initialScreenDecisions="DEFAULT";
}else{
JOptionPane.showMessageDialog(null, "You must disable the '>>' option before you can use this.");
}
}
});
buttonhelp = new JButton("HELP");
buttonhelp.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(null, "This screen allows you to determine the entry details from" +
"\nthe current batch that will be included in the final return." +
"\nSelect the details you wish to include and click the > arrow to" +
"\nmove them to the right side. Pressing the >> button will" +
"\ninclude all entry details for the current batch in the final" +
"\nreturn. Clicking the < button will move a detail back."+
"\nClick << to omit the entire batch. Use confirm to continue"+
"\nto the next step or 'create return' to finish the Nacha return"+
"\nwith all past additions.");
}
});
buttonPanel.setLayout(new BorderLayout());
topButtons.add(buttonin);
topButtons.add(buttonall);
topButtons.add(buttonnone);
topButtons.add(buttonout);
bottomButtons.add(buttonhelp);
buttonPanel.add(topButtons,BorderLayout.NORTH);
buttonPanel.add(buttonhelp,BorderLayout.SOUTH);
JPanel bottomPanel = new JPanel();
bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.LINE_AXIS));
bottomPanel.add(Box.createRigidArea(new Dimension(10,0)));
bottomPanel.add(list1);
bottomPanel.add(Box.createRigidArea(new Dimension(5,0)));
bottomPanel.add(buttonPanel);
bottomPanel.add(Box.createRigidArea(new Dimension(5,0)));
bottomPanel.add(list2);
bottomPanel.add(Box.createRigidArea(new Dimension(10,0)));
panel.setLayout(new BorderLayout());
panel.add(panelTop,BorderLayout.NORTH);
panel.add(bottomPanel,BorderLayout.CENTER);
panel.setOpaque(true);
return panel;
}
您可以忽略上述＆gt;＆gt;按钮内容。现在，它将允许用户选择列表中的所有项目，它不会直观地显示选择。如果我得到＆gt;＆gt;按钮一次移动所有项目然后我不需要你已经实现的额外步骤。
答案 0 :(得分：1)
我不太确定您的所有变量类型是什么，但我认为这应该适用于>>的ActionListener。
for (int i = 0; i < input.getSize(); i++) {
output.addElement(input.get(i));
}
input.clear();