如上图所示;
当用户选择项目和项目名称并单击添加按钮时,会出现以下情况:
但随后将ArrayIndexOutOfBound
错误显示为:
java.lang.ArrayIndexOutOfBoundException: 1>=1
然后选择另一个项目和项目名称并执行上述过程显示相同的错误:
java.lang.ArrayIndexOutOfBoundException: 2>=2
同时将Qty,Discount,Total列重置为最后一行的值。
添加按钮操作执行方法;
private void add_btnActionPerformed(java.awt.event.ActionEvent evt) {
int i=0;
int j=0;
String temp = (String) IDcombo.getSelectedItem();
String temp2 = (String) Namecombo.getSelectedItem();
String sql = "select ItemID,ItemName,CostPrice from druginfo where ItemID=?";
try {
pst=conn.prepareStatement(sql);
pst.setString(1, temp);
rs=pst.executeQuery();
addDataToTable(tableSale,DbUtils.resultSetToTableModel(rs));//this method for adding multiple lines in the table
IDcombo.setSelectedItem(null);
Namecombo.setSelectedItem(null);
exptxt.setText(null);
instock.setText(null);
//getting user input for selling qty
String Qty=JOptionPane.showInputDialog("Insert Selling Quantity :");
double sellingqty=Double.parseDouble(Qty);
//getting user input for specific item discount
String discount = JOptionPane.showInputDialog("Insert Item Discount");
double idiscount=Double.parseDouble(discount);
for(j=0;j<100;j++){
double icost =(double) tableSale.getModel().getValueAt(j,2);
System.out.println(icost);
//calculating Gross Total
double grosstotal = (sellingqty*icost)-idiscount;
System.out.println(grosstotal);
for(i=0;i<100;i++){
//setting qty input value to table sale
tableSale.getModel().setValueAt(sellingqty,i, 3);
//setting input value to table sale
tableSale.getModel().setValueAt(idiscount,i, 4);
//setting grosstotal value to table sale
tableSale.getModel().setValueAt(grosstotal,i, 5);
}
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "error "+ex);
ex.printStackTrace();
}
}
这是堆栈跟踪;
java.lang.ArrayIndexOutOfBoundsException: 1 >= 1
at java.util.Vector.elementAt(Vector.java:474)
at javax.swing.table.DefaultTableModel.setValueAt(DefaultTableModel.java:664)
at com.bit.project.Newsale.add_btnActionPerformed(Newsale.java:720)
java.lang.ArrayIndexOutOfBoundsException: 2 >= 2
at java.util.Vector.elementAt(Vector.java:474)
at javax.swing.table.DefaultTableModel.setValueAt(DefaultTableModel.java:664)
at com.bit.project.Newsale.add_btnActionPerformed(Newsale.java:720)
答案 0 :(得分:3)
删除for循环并使用此代码
int i = jTable1.getRowCount()-1;
double icost = (double) tableSale.getModel().getValueAt(i, 2);
System.out.println(icost);
//calculating Gross Total
double grosstotal = (sellingqty * icost) - idiscount;
System.out.println(grosstotal);
//setting qty input value to table sale
tableSale.getModel().setValueAt(sellingqty, i, 3);
//setting input value to table sale
tableSale.getModel().setValueAt(idiscount, i, 4);
//setting grosstotal value to table sale
tableSale.getModel().setValueAt(grosstotal, i, 5);
java.lang.ArrayIndexOutOfBoundsException: 1 >= 1
表示只有一行,但是您正在访问第一行的第一行。但是没有第二行。您添加的新行是真的,但是当您调用getValueAt()
时细胞应该存在
在我的代码中
int i = jTable1.getRowCount()-1;
int我将得到最后一行索引,例如,如果只有1行,那么我是0。所以从当前行获取值使用getValueAt(i, 2);
.same到setValueAt();