java类库详细讲解

				
				
				
				Converting a Column Index Between the View and Model in a JTable Component
				(Java Developers Almanac Example)
				
				
				
				
				
				
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				The Java Developers Almanac 1.4
				
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				    javax.swing.table
				         [62 examples]
				        
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				        Columns
				             [11 examples]
				            
				
				  
				    e914.  
				    Converting a Column Index Between the View and Model in a JTable Component
				
				A column in a JTable component has two types of indices, a visible
				index and a model index. The visible index of a column is its visible
				location on the screen. The model index of a column is its permanent
				position in a TableModel, which contains the actual data.  This
				example demonstrates how to convert a column index between the two
				forms.
				
				
				
				    // Converts a visible column index to a column index in the model.
				    // Returns -1 if the index does not exist.
				    public int toModel(JTable table, int vColIndex) {
				        if (vColIndex >= table.getColumnCount()) {
				            return -1;
				        }
				        return table.getColumnModel().getColumn(vColIndex).getModelIndex();
				    }
				    
				    // Converts a column index in the model to a visible column index.
				    // Returns -1 if the index does not exist.
				    public int toView(JTable table, int mColIndex) {
				        for (int c=0; c<table.getColumnCount(); c++) {
				            TableColumn col = table.getColumnModel().getColumn(c);
				            if (col.getModelIndex() == mColIndex) {
				                return c;
				            }
				        }
				        return -1;
				    }
				
				
				
				
				             Related Examples
				        
				
				
				
				
				e915. 
				    Enumerating the Columns in a JTable Component
				
				
				
				e916. 
				    Setting the Width of a Column in a JTable Component
				
				
				
				e917. 
				    Setting the Column Resize Mode of a JTable Component
				
				
				
				e918. 
				    Locking the Width of a Column in a JTable Component
				
				
				
				e919. 
				    Appending a Column to a JTable Component
				
				
				
				e920. 
				    Inserting a Column in a JTable Component
				
				
				
				e921. 
				    Removing a Column from a JTable Component
				
				
				
				e922. 
				    Moving a Column in a JTable Component
				
				
				
				e923. 
				    Allowing the User to Move a Column in a JTable Component
				
				
				
				e924. 
				    Allowing the User to Resize a Column in a JTable Component
				
				
				
				
				
				
				
				
				        See also: 
				
				    Cells
				  
				
				
				    Column Heads
				  
				
				
				    Editing
				  
				
				
				    Events
				  
				
				
				    Layout
				  
				
				
				    Rows
				  
				
				
				    Scrolling
				  
				
				
				    Selection
				  
				
				
				    Sorting
				  
				
				
				    Table Model
				  
				
				
				    Tool Tips
				  
				
				
				
				
				
				
				
				
				
				© 2002 Addison-Wesley.