java温度转换设计

Container cp=this.getContentPane(); cp.setLayout(null); jt1.setBounds(10,10,100,20); cp.add(jt1); jb1.setBounds(130,10,100,20); cp.add(jb1); jb.setBounds(70,50,100,20); cp.add(jb); jb.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {