Java 更新gui二进制数组列表

该程序的目标是将二进制文件读入arraylist，然后在gui窗口中显示它。有5个索引，我使用curIndex来更新它。我认为我的问题在于refreshUI（）。我不能让它更新为新的索引。我也不知道如何设置刷新中的字段。如果你能给我指出正确的方向，那就太棒了！多谢各位

 ArrayList<SalesAgent> salesForce = new ArrayList<>();
int curIndex = 0;

public RecordViewerPanel() throws ClassNotFoundException, IOException {
    initComponents();
    ObjectInputStream input = new ObjectInputStream(
            new BufferedInputStream(
                    new FileInputStream("sales.bin")));

    while (curIndex < 5) {

        String first = input.readUTF();
        String last = input.readUTF();
        double sales = input.readDouble();
        Date date = (Date) input.readObject();
        salesForce.add(new SalesAgent(first, last, sales, date));
        refreshUI();
    }


}

private void refreshUI() {
salesForce.get(curIndex);
lastTextField.setText(salesForce.getLast());
salesTextField.setText(String.valueOf(salesForce.getSales()));
dateTextField.setText(String.valueOf(salesForce.getDate()));

    jPanel2.repaint();
    curIndex++;

}

/**
 * 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")


    nextButton.setText(">>");
    nextButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            nextButtonActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
    jPanel2.setLayout(jPanel2Layout);
    jPanel2Layout.setHorizontalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                .addGroup(jPanel2Layout.createSequentialGroup()
                    .addGap(24, 24, 24)
                    .addComponent(firstTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(26, 26, 26)
                    .addComponent(lastTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addComponent(salesTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(26, 26, 26)
                    .addComponent(dateTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 134, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGap(64, 64, 64))
                .addGroup(jPanel2Layout.createSequentialGroup()
                    .addGap(39, 39, 39)
                    .addComponent(jLabel3)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(jPanel2Layout.createSequentialGroup()
                            .addGap(31, 31, 31)
                            .addComponent(jLabel4)
                            .addGap(70, 70, 70)
                            .addComponent(jLabel5)
                            .addGap(101, 101, 101)
                            .addComponent(jLabel6))
                        .addGroup(jPanel2Layout.createSequentialGroup()
                            .addGap(254, 254, 254)
                            .addComponent(previousButton)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                            .addComponent(nextButton)))))
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );
    jPanel2Layout.setVerticalGroup(
        jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(jPanel2Layout.createSequentialGroup()
            .addGap(29, 29, 29)
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel3)
                .addComponent(jLabel4)
                .addComponent(jLabel5)
                .addComponent(jLabel6))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(firstTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(lastTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(salesTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addComponent(dateTextField, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(previousButton)
                .addComponent(nextButton)))
    );

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
    this.setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addComponent(jPanel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addContainerGap())
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
    );
}// </editor-fold>                        

private void previousButtonActionPerformed(java.awt.event.ActionEvent evt) {                                               
    if (curIndex > 0) {
        curIndex--;
    } else if (curIndex == 0) {
        curIndex = 4;
    }
    salesForce.get(curIndex);
    refreshUI();
}                                              

private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
    if (curIndex < 4) {
        curIndex++;
    } else if (curIndex == 4) {
        curIndex = 0;
    }
    salesForce.get(curIndex);
    refreshUI();
} 

ArrayList salesForce=new ArrayList（）；
int-curIndex=0；
public RecordViewerPanel（）抛出ClassNotFoundException，IOException{
初始化组件（）；
ObjectInputStream输入=新ObjectInputStream(
新的BufferedInputStream(
新文件输入流（“sales.bin”）；
while（curIndex<5）{
String first=input.readUTF（）；
字符串last=input.readUTF（）；
double sales=input.readDouble（）；
Date Date=（Date）input.readObject（）；
添加（新的SalesAgent（第一个、最后一个、销售、日期））；
refreshUI（）；
}
}
私有void refreshUI（）{
salesForce.get（curIndex）；
setText（salesForce.getLast（））；
salesTextField.setText（String.valueOf（salesForce.getSales（））；
dateTextField.setText（String.valueOf（salesForce.getDate（））；
jPanel2.repaint（）；
curIndex++；
}
/**
*从构造函数中调用此方法来初始化表单。
*警告：请勿修改此代码。此方法的内容始终是
*由表单编辑器重新生成。
*/
@抑制警告（“未选中”）
nextButton.setText（“>>”）；
addActionListener（新java.awt.event.ActionListener（）{
public void actionPerformed（java.awt.event.ActionEvent evt）{
执行下一个按钮操作（evt）；
}
});
javax.swing.GroupLayout jPanel2Layout=新的javax.swing.GroupLayout（jPanel2）；
设置布局（jPanel2布局）；
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.TRAILING，false）
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGap（24,24,24）
.addComponent（第一个文本字段，javax.swing.GroupLayout.PREFERRED\u大小，javax.swing.GroupLayout.DEFAULT\u大小，javax.swing.GroupLayout.PREFERRED\u大小）
.addGap（26,26,26）
.addComponent（lastTextField，javax.swing.GroupLayout.PREFERRED\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.UNRELATED）
.addComponent（salesTextField、javax.swing.GroupLayout.PREFERRED\u SIZE、javax.swing.GroupLayout.DEFAULT\u SIZE、javax.swing.GroupLayout.PREFERRED\u SIZE）
.addGap（26,26,26）
.addComponent（dateTextField，javax.swing.GroupLayout.PREFERRED_SIZE，134，javax.swing.GroupLayout.PREFERRED_SIZE）
.addGap（64,64,64））
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGap（39,39,39）
.addComponent（jLabel3）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u值）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGap（31,31,31）
.addComponent（jLabel4）
.addGap（70,70,70）
.addComponent（jLabel5）
.addGap（101、101、101）
.addComponent（jLabel6））
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGap（254，254，254）
.addComponent（上一个按钮）
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addComponent（下一个按钮‘‘‘）’）
.addContainerGap（javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u VALUE））
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jPanel2Layout.createSequentialGroup（）
.addGap（29,29,29）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（jLabel3）
.addComponent（jLabel4）
.addComponent（jLabel5）
.addComponent（jLabel6））
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.LEADING）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（第一个文本字段，javax.swing.GroupLayout.PREFERRED\u大小，javax.swing.GroupLayout.DEFAULT\u大小，javax.swing.GroupLayout.PREFERRED\u大小）
.addComponent（lastTextField，javax.swing.GroupLayout.PREFERRED\u SIZE，javax.swing.GroupLayout.DEFAULT\u SIZE，javax.swing.GroupLayout.PREFERRED\u SIZE）
.addComponent（salesTextField、javax.swing.GroupLayout.PREFERRED\u SIZE、javax.swing.GroupLayout.DEFAULT\u SIZE、javax.swing.GroupLayout.PREFERRED\u SIZE））
.addComponent（dateTextField，javax.swing.GroupLayout.PREFERRED_SIZE，28，javax.swing.GroupLayout.PREFERRED_SIZE））
.addPreferredGap（javax.swing.LayoutStyle.ComponentPlacement.RELATED，javax.swing.GroupLayout.DEFAULT\u SIZE，Short.MAX\u值）
.addGroup（jPanel2Layout.createParallelGroup（javax.swing.GroupLayout.Alignment.BASELINE）
.addComponent（上一个按钮）
.addComponent（下一个按钮
private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
    if (curIndex < 4) {
        curIndex++;
    } else if (curIndex == 4) {
        curIndex = 0;
    }
    salesForce.get(curIndex);
    refreshUI();
} 

private void nextButtonActionPerformed(java.awt.event.ActionEvent evt) { 
  curIndex++;
  curIndex %= salesForce.size(); // mod it by size of your List
  currentSalesAgent = salesForce.get(curIndex);
  // salesForce.get(curIndex); // this throws out the result returned by get(...)
  refreshUI();
} 

private SalesAgent currentSalesAgent;

currentSalesAgent = salesForce.get(curIndex);

// salesTextField.setText(String.valueOf(salesForce.getSales())); // this shouldn't compile!
salesTextField.setText(String.valueOf(currentSalesAgent.getSales()));

salesForce.getSales()

ArrayList<SalesAgent> salesForce = new ArrayList<>();

lastTextField.setText(salesForce.getLast());
salesTextField.setText(String.valueOf(salesForce.getSales()));
dateTextField.setText(String.valueOf(salesForce.getDate()));