combo的使用

        combo  =   new  Combo(shell, SWT.NONE);        combo.setBounds( 38 ,  29 ,  125 ,  20 );         final  Button button  =   new  Button(shell, SWT.NONE);        button.addSelectionListener( new  SelectionAdapter()  ... {            public void widgetSelected(SelectionEvent e)            ...{                combo.removeAll();                for (int i=0;i<=9;i++)                ...{                    combo.add("第"+i+"个字符串");                    combo.select(0);                }            }        } );        button.setText( " 设置 " );        button.setBounds( 38 ,  101 ,  48 ,  22 );         final  Button button_1  =   new  Button(shell, SWT.NONE);        button_1.addSelectionListener( new  SelectionAdapter()  ... {            public void widgetSelected(SelectionEvent e)            ...{                MessageDialog.openInformation(shell, null, combo.getText());            }        } );        button_1.setText( " 取值 " );        button_1.setBounds( 142 ,  101 ,  48 ,  22 );