我有一个边框布局,我想在中心部分添加一个网格布局。但是,我不能声明一个网格,然后添加我的中心边框。我怎样才能做到这一点?
public Liability_Calculator(String s)
{
super(s);
setSize(325,200);
c = getContentPane();
c.setLayout(new BorderLayout());
//the top label
total = new JLabel("Total monthly liabilities ", JLabel.CENTER);
c.add(total, BorderLayout.NORTH);
//the grid
GridLayout grid = new GridLayout(2,2);
text_field1 = new JTextField(7);
//I GET AN ERROR HERE!!!!!!!
grid.add(text_field1);
//AND ERROR HERE!!!!!!!!!!!!!
c.add(grid, BorderLayout.CENTER);
setVisible(true);
}