“线程中的异常”;AWT-EventQueue-0“;java.lang.NullPointerException
当我尝试从表中添加列时,它们会给我这个错误“线程中的异常”;AWT-EventQueue-0“;java.lang.NullPointerException,java,netbeans-8,Java,Netbeans 8,当我尝试从表中添加列时,它们会给我这个错误 private void SAVEALLActionPerformed(java.awt.event.ActionEvent evt) { model=(DefaultTableModel)tblCont.getModel(); int col=tblCont.getColumnCount(); String[]field=new String[c
private void SAVEALLActionPerformed(java.awt.event.ActionEvent evt)
{
model=(DefaultTableModel)tblCont.getModel();
int col=tblCont.getColumnCount();
String[]field=new String[col-2];
String[]value=new String[col-2];
field[0]="ID";
field[col-3]="Total";
int pop=1;
for (int i = 3; i < col-1; i++) {
field[pop]=String.valueOf(tblCont.getColumnName(i));
pop++;
}
try {
for(int i=0;i<tblCont.getRowCount();i++){
int opo=1;
int test=0; int tes=0;
value[0]=String.valueOf(model.getValueAt(i, 0));
for (int j = 3; j < col-1; j++) {
value[opo]=String.valueOf(model.getValueAt(i, j));
//Here points my error
tes =tes + Integer.parseInt(value[pop].trim());
test=test+tes;
opo++;
}
String tet = Integer.toString(test);
value[col-4]=tet;
JOptionPane.showMessageDialog(this, tet);
UpdateRec(field, value, "contribution");
}
} catch (SQLException e) {
JOptionPane.showMessageDialog(this, e.getMessage());
}
TableClearCont();
ShowContFile();
}
private void SAVEALLActionPerformed(java.awt.event.ActionEvent evt)
{
model=(DefaultTableModel)tblCont.getModel();
int col=tblCont.getColumnCount();
字符串[]字段=新字符串[col-2];
字符串[]值=新字符串[col-2];
字段[0]=“ID”;
字段[col-3]=“总计”;
int-pop=1;
对于(int i=3;i 对于(int i=0;i表中的值为空
做一些基本的调试
String cellValue = model.getValueAt(i, j).toString().trim();
//Here points my error
System.out.println(cellValue + " : " + i + " : " + j);
tes += Integer.parseInt(cellValue);
value[opo] = cellValue;
一旦知道哪个值为空,请修复表中的数据。方法名称不应以大写字符开头。您是否见过Java API中的方法以大写字符开头?请遵循Java约定!抱歉,我还是一名学生,但无论如何,感谢您的提醒