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Ranch Hand
Posts: 30
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I am trying to create a Jtable using Vectors. When I compile the code I get the following error. What is the cause of this error?
C:\j2sdk1.4.1_04\bin\dev\Table>java SimpleTableDemo
Exception in thread "main" java.lang.ClassCastException
at javax.swing.table.DefaultTableModel.justifyRows(DefaultTableModel.jav
a:238)
at javax.swing.table.DefaultTableModel.setDataVector(DefaultTableModel.j
ava:194)
at javax.swing.table.DefaultTableModel.<init>(DefaultTableModel.java:131
)
at javax.swing.JTable.<init>(JTable.java:392)
at SimpleTableDemo.<init>(SimpleTableDemo.java:29)
at SimpleTableDemo.main(SimpleTableDemo.java:70)
 
author and iconoclast
Sheriff
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The two arguments to the JTable constructor you're using are supposed to be a Vector of Vectors of cell contents, and a Vector of Strings. You're passing, instead, a Vector of Appointment objects, and a Vector containing a single AppointmentHeader object. I can't be sure what your intention is, but I think you want to do something like (code deliberately direct and straightforward, you could certainly use loops ...

If you want to take the data directly from your business objects, then you need to write your own custom TableModel.
 
Greenhorn
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hi!
u have to add the field in the Table by using 2D Array or set the vector in the Table. If u want to add the field dynamically u have to uise the DefaultTableModel. I suggest u to use DefaultTableModel.
Take Care
Bye...
 
It is sorta covered in the JavaRanch Style Guide.
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