CODEWITHSUNDEEP
javaswingjtableclasscastexception
user3808021
user3808021

Reputation:

ClassCastException in JTable.getValueAt(...)

My problem is in this code:

int rowToTable = table.getSelectedRow();
int bookId = (int)table.getValueAt(rowToTable, 0);  // line 158

What is the solution?

I need an int value of bookID, Not Object.

StackTrace:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
at Project.BookPage_Admin.dellAction(BookPage_Admin.java:158)
at Project.BookPage_Admin.actionPerformed(BookPage_Admin.java:126)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)

Upvotes: 2

Views: 933

Answers (3)

nano_nano
nano_nano

Reputation: 12523

try this solution:

int rowToTable = table.getSelectedRow();
int bookId = Integer.valueOf((String)table.getValueAt(rowToTable, 0));

or 

int bookId = Integer.parseInt((String)table.getValueAt(rowToTable, 0));

valueOf does internaly also a parseInt.

Upvotes: 1

user1246808
user1246808

Reputation:

It looks like you have String values in that table. In that case:

int value = Integer.parseInt((String) table.getValueAt(rowToTable, 0));

Upvotes: 2

Sanjeev
Sanjeev

Reputation: 9946

If you know for sure that the content of that column is integer than instead of type casting to int just use Integer#parseInt()

 int bookId = Integer.parseInt((String)table.getValueAt(rowToTable, 0));

Hope this helps.

Upvotes: 1

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