Java 需要帮助将我的地图复制到此列表中吗

我正在用HashMap和GUI做家庭作业。用户将输入一个国家，以及该国的首都，然后按Add，这将把这两个字符串添加到地图中，它将把首都添加到右边的列表中。接下来是搜索功能。用户将能够键入国家的名称，并在添加的其他首都中，在右侧突出显示以蓝色表示的国家首都。这是它应该是什么样子

如何将hashMap的内容复制到JList？我只需要显示大写字母，这样我就可以搜索它们了

非常感谢您的帮助，谢谢

另外，对于生成的代码很抱歉，因为它，变量声明位于底部

import java.util.ArrayList;
import java.util.HashMap;

public class MapPanel extends javax.swing.JPanel {

HashMap<String, String> hashMap=new HashMap<String,String>();
ArrayList<String> array = new ArrayList<String>();

/**
 * Creates new form MapPanel
 */
public MapPanel() {
    initComponents();
}

/**
 * This method is called from within the constructor to initialize the form.
 * WARNING: Do NOT modify this code. The content of this method is always
 * regenerated by the Form Editor.
 */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    searchPanel = new javax.swing.JPanel();
    countrySearch = new javax.swing.JTextField();
    jLabel3 = new javax.swing.JLabel();
    jButton2 = new javax.swing.JButton();
    inputPanel = new javax.swing.JPanel();
    countryInput = new javax.swing.JTextField();
    capitalInput = new javax.swing.JTextField();
    jLabel1 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();
    jButton1 = new javax.swing.JButton();
    listPanel = new javax.swing.JPanel();
    jScrollPane1 = new javax.swing.JScrollPane();
    capitalList = new javax.swing.JList();

    searchPanel.setBorder(javax.swing.BorderFactory.createEtchedBorder());

    jLabel3.setText("Search Country");

    jButton2.setText("Search");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton2ActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout searchPanelLayout = new javax.swing.GroupLayout(searchPanel);
    searchPanel.setLayout(searchPanelLayout);
    searchPanelLayout.setHorizontalGroup(
        searchPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(searchPanelLayout.createSequentialGroup()
            .addGroup(searchPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(searchPanelLayout.createSequentialGroup()
                    .addGroup(searchPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(searchPanelLayout.createSequentialGroup()
                            .addGap(14, 14, 14)
                            .addComponent(jLabel3))
                        .addGroup(searchPanelLayout.createSequentialGroup()
                            .addContainerGap()
                            .addComponent(countrySearch, javax.swing.GroupLayout.PREFERRED_SIZE, 236, javax.swing.GroupLayout.PREFERRED_SIZE)))
                    .addGap(0, 0, Short.MAX_VALUE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, searchPanelLayout.createSequentialGroup()
                    .addGap(0, 0, Short.MAX_VALUE)
                    .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)))
            .addContainerGap())
    );
    searchPanelLayout.setVerticalGroup(
        searchPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(searchPanelLayout.createSequentialGroup()
            .addGap(10, 10, 10)
            .addComponent(jLabel3)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(countrySearch, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 41, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    countryInput.setToolTipText("");
    countryInput.addFocusListener(new java.awt.event.FocusAdapter() {
        public void focusGained(java.awt.event.FocusEvent evt) {
            countryInputFocusGained(evt);
        }
    });

    jLabel1.setText("Country");

    jLabel2.setText("Capital");

    jButton1.setText("Add");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout inputPanelLayout = new javax.swing.GroupLayout(inputPanel);
    inputPanel.setLayout(inputPanelLayout);
    inputPanelLayout.setHorizontalGroup(
        inputPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(inputPanelLayout.createSequentialGroup()
            .addGap(15, 15, 15)
            .addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        .addGroup(inputPanelLayout.createSequentialGroup()
            .addContainerGap()
            .addGroup(inputPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(countryInput)
                .addComponent(capitalInput)
                .addGroup(inputPanelLayout.createSequentialGroup()
                    .addGap(8, 8, 8)
                    .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(0, 0, Short.MAX_VALUE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, inputPanelLayout.createSequentialGroup()
                    .addGap(0, 0, Short.MAX_VALUE)
                    .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 65, javax.swing.GroupLayout.PREFERRED_SIZE)))
            .addContainerGap())
    );
    inputPanelLayout.setVerticalGroup(
        inputPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(inputPanelLayout.createSequentialGroup()
            .addGap(19, 19, 19)
            .addComponent(jLabel1)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(countryInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addGap(23, 23, 23)
            .addComponent(jLabel2)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(capitalInput, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 40, Short.MAX_VALUE)
            .addContainerGap())
    );

    jScrollPane1.setViewportView(capitalList);

    javax.swing.GroupLayout listPanelLayout = new javax.swing.GroupLayout(listPanel);
    listPanel.setLayout(listPanelLayout);
    listPanelLayout.setHorizontalGroup(
        listPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(listPanelLayout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 226, Short.MAX_VALUE)
            .addContainerGap())
    );
    listPanelLayout.setVerticalGroup(
        listPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, listPanelLayout.createSequentialGroup()
            .addContainerGap()
            .addComponent(jScrollPane1)
            .addContainerGap())
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
    this.setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                .addComponent(inputPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(searchPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
            .addComponent(listPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(listPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addComponent(inputPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(searchPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
    );
}// </editor-fold>                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String text = countryInput.getText();
    String text2 = capitalInput.getText();
    hashMap.put(text,text2);

}                                        

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
hashMap.get(countrySearch.getText());
}                                        

private void countryInputFocusGained(java.awt.event.FocusEvent evt) {                                         
    countryInput.requestFocusInWindow();
}                                        


// Variables declaration - do not modify                     
private javax.swing.JTextField capitalInput;
private javax.swing.JList capitalList;
private javax.swing.JTextField countryInput;
private javax.swing.JTextField countrySearch;
private javax.swing.JPanel inputPanel;
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JPanel listPanel;
private javax.swing.JPanel searchPanel;
// End of variables declaration                   
}

import java.util.ArrayList；
导入java.util.HashMap；
公共类MapPanel扩展了javax.swing.JPanel{
HashMap HashMap=新的HashMap（）；
ArrayList数组=新的ArrayList（）；
/**
*创建新的表单映射面板
*/
公共地图面板（）{
初始化组件（）；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
//                           
私有组件（）{
searchPanel=newjavax.swing.JPanel（）；
countrySearch=newjavax.swing.JTextField（）；
jLabel3=newjavax.swing.JLabel（）；
jButton2=newjavax.swing.JButton（）；
inputPanel=newjavax.swing.JPanel（）；
countryInput=newjavax.swing.JTextField（）；
capitalInput=newjavax.swing.JTextField（）；
jLabel1=newjavax.swing.JLabel（）；
jLabel2=newjavax.swing.JLabel（）；
jButton1=newjavax.swing.JButton（）；
listPanel=newjavax.swing.JPanel（）；
jScrollPane1=newjavax.swing.JScrollPane（）；
capitalList=newjavax.swing.JList（）；
searchPanel.setboorder（javax.swing.BorderFactory.createtchedborder（））；
jLabel3.setText（“搜索国家”）；
jButton2.setText（“搜索”）；
jButton2.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton2ActionPerformed（evt）；
}
});
javax.swing.GroupLayout searchPanelLayout=新建javax.swing.GroupLayout（searchPanel）；
searchPanel.setLayout（searchPanelLayout）；
searchPanelLayout.setHorizontalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（searchPanelLayout.createSequentialGroup（）
.addGroup（searchPanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（searchPanelLayout.createSequentialGroup（）
.addGroup（searchPanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（searchPanelLayout.createSequentialGroup（）
.addGap（14,14,14）
.addComponent（jLabel3））
.addGroup（searchPanelLayout.createSequentialGroup（）
.addContainerGap（）
.addComponent（countrySearch，javax.swing.GroupLayout.PREFERRED_SIZE，236，javax.swing.GroupLayout.PREFERRED_SIZE）））
.addGap（0，0，短.MAX_值））
.addGroup（javax.swing.GroupLayout.Alignment.TRAILING，searchPanelLayout.createSequentialGroup（）
.addGap（0，0，短.MAX_值）
.addComponent（jButton2，javax.swing.GroupLayout.PREFERRED_SIZE，65，javax.swing.GroupLayout.PREFERRED_SIZE）））
.addContainerGap（））
);
searchPanelLayout.setVerticalGroup(
createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（searchPanelLayout.createSequentialGroup（）
.addGap（10,10,10）
.addComponent（jLabel3）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（countrySearch，javax.swing.GroupLayout.PREFERRED\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（jButton2，javax.swing.GroupLayout.PREFERRED_SIZE，41，javax.swing.GroupLayout.PREFERRED_SIZE）
.addContainerGap（javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u VALUE））
);
countryInput.setToolTipText（“”）；
countryInput.addFocusListener（新java.awt.event.FocusAdapter（）{
public void focusgoven（java.awt.event.FocusEvent evt）{
国家投入焦点（evt）；
}
});
jLabel1.setText（“国家”）；
jLabel2.setText（“资本”）；
jButton1.setText（“添加”）；
jButton1.addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
jButton1ActionPerformed（evt）；
}
});
javax.swing.GroupLayout inputPanelLayout=新建javax.swing.GroupLayout（inputPanel）；
inputPanel.setLayout（inputPanelLayout）；
inputPanelLayout.setHorizontalGroup(
inputPanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（inputPanelLayout.createSequentialGroup（）
.addGap（15,15,15）
.addComponent（jLabel2，javax.swing.GroupLayout.PREFERRED\u SIZE，84，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addContainerGap（javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u VALUE））
.addGroup（inputPanelLayout.createSequentialGroup（）
.addContainerGap（）
.addGroup（inputPanelLayout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addComponent（countryInput）
.addComponent（capitalInput）
.addGroup（inputPanelLayout.createSequentialGroup（）
.addGap（8,8,8）
.addComponent（jLabel1，javax.swing.Group
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)
{                                         
    String text = countryInput.getText();
    String text2 = capitalInput.getText();
    hashMap.put(text,text2);
    capitalList.setListData(hashMap.values().toArray());
}

MapPanel mp = new MapPanel();
JFrame frame = new JFrame("Countries and capitals");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(mp);
frame.pack();
frame.setVisible(true);