PLease assist with my JTable Loop Exception

huangapple
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英文:

PLease assist with my JTable Loop Exception

问题

以下是您的代码部分的翻译：

  1. 这是我的代码，我正在尝试循环遍历我的新库存表中的所有行。即使我使用totalRows - 1，我仍然收到相同的异常。任何帮助将不胜感激。
  3. private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
  4.     int totalRows = newTable.getRowCount();
  5.     String tempName = "";
  6.     int tempTotal = 0;
  7.     System.out.println("总新行数：" + totalRows);
  9.     try {
  10.         for (int i = 0; i < (totalRows - 1); i++) {
  11.             tempName = currentTable.getModel().getValueAt(i, 0).toString();
  12.             tempTotal = Integer.parseInt(currentTable.getModel().getValueAt(i, 1).toString());
  13.             System.out.println("当前表产品：" + currentTable.getModel().getValueAt(i, 0).toString());
  14.             System.out.println("当前表总计：" + currentTable.getModel().getValueAt(i, 1).toString());
  16.             System.out.println("新表产品：" + newTable.getModel().getValueAt(i, 0).toString());
  17.             System.out.println("新表临时总计：" + newTable.getModel().getValueAt(i, 1).toString());
  19.             //if (newTable.getModel().getValueAt(i, 0).toString() == currentTable.getModel().getValueAt(i, 0).toString()) {
  20.             //    int newTempTotal = Integer.parseInt(newTable.getModel().getValueAt(i, 1).toString());
  21.             //    newTotal = newTempTotal + tempTotal;
  22.             //    System.out.println("产品：" + newTable.getModel().getValueAt(i, 0).toString());
  23.             //    System.out.println("新总计：" + newTotal);
  24.             //}
  25.         }
  26.     } catch (Exception e) {
  27.         e.printStackTrace();
  28.     }
  29. }

然后，我收到以下异常：

  1. java.lang.ArrayIndexOutOfBoundsException: 3 >= 3
  2. at java.util.Vector.elementAt(Vector.java:477)
  3. at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:648)
  4. at great.meat.AddNewStock.jButton1ActionPerformed(AddNewStock.java:325)
  5. at great.meat.AddNewStock.access$300(AddNewStock.java:23)
  6. at great.meat.AddNewStock$4.actionPerformed(AddNewStock.java:210)
  7. at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
英文:

Here is my code where I'm trying to loop through all the rows in my new stock table. Even when I use totalRows - 1 I still get the same exeption. Any help will be appreciated.

  1. private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
  2. int totalRows = newTable.getRowCount();
  3. String tempName = &quot;&quot;;
  4. int tempTotal = 0;
  5. System.out.println(&quot;total new rows: &quot; + totalRows);
  6. try {
  7. for (int i = 0; i &lt; (totalRows - 1); i++) {
  8. tempName = currentTable.getModel().getValueAt(i, 0).toString();
  9. tempTotal = Integer.parseInt(currentTable.getModel().getValueAt(i, 1).toString());
  10. System.out.println(&quot;Current Table Product:    &quot; + currentTable.getModel().getValueAt(i, 0).toString());
  11. System.out.println(&quot;Current Table Total:  &quot; + currentTable.getModel().getValueAt(i, 1).toString());
  12. System.out.println(&quot;New Table Product:    &quot; + newTable.getModel().getValueAt(i, 0).toString());
  13. System.out.println(&quot;New Table Temp Total:  &quot; + newTable.getModel().getValueAt(i, 1).toString());
  14. //if (newTable.getModel().getValueAt(i, 0).toString() == currentTable.getModel().getValueAt(i, 0).toString()) {
  15. //    int newTempTotal = Integer.parseInt(newTable.getModel().getValueAt(i, 1).toString());
  16. //    newTotal = newTempTotal + tempTotal;
  17. //    System.out.println(&quot;product:    &quot; + newTable.getModel().getValueAt(i, 0).toString());
  18. //    System.out.println(&quot;grand new total:    &quot; + newTotal);
  19. //}
  20. }
  21. } catch (Exception e) {
  22. e.printStackTrace();
  23. }
  24. }

Then I get the following exception...

  1. java.lang.ArrayIndexOutOfBoundsException: 3 &gt;= 3
  2. at java.util.Vector.elementAt(Vector.java:477)
  3. at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:648)
  4. at great.meat.AddNewStock.jButton1ActionPerformed(AddNewStock.java:325)
  5. at great.meat.AddNewStock.access$300(AddNewStock.java:23)
  6. at great.meat.AddNewStock$4.actionPerformed(AddNewStock.java:210)
  7. at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)

答案1

得分: 1

我不知道两个表格各有多少行，但是你的问题可能出在这一行：

tempName = currentTable.getModel().getValueAt(i, 0).toString();

因为你正在使用newTable的行数进行循环：

int totalRows = newTable.getRowCount();

但是你试图从currentTable获取数据。如果currentTable的行数少于newTable，那么它会抛出异常。

英文:

I don't know how many rows both tables have, but your problem could be in this line:

  1. tempName = currentTable.getModel().getValueAt(i, 0).toString();

because you are looping using the newTable row count:

  1. int totalRows = newTable.getRowCount();

but you're trying to get the data from currentTable. If currentTable has less rows than newTable then it will throw an exception.

huangapple
  • 本文由 发表于 2020年7月30日 18:13:47
  • 转载请务必保留本文链接：https://go.coder-hub.com/63170991.html
  • indexoutofboundsexception
  • java
  • jtable
  • swing
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