//请编程设计一个登陆界面，要求输入账号和密码import java.awt.*;//引用import javax.swing.*;public class qwe{public static void main(String[] args) {JFrame jf = new JFrame("登陆界面");jf.setVisible(true);//设置窗体可见jf.setSize(500, 200);//设置窗口初显大小jf.setLocationRelativeTo(null);JPanel jp=new JPanel();jp.setLayout(new BorderLayout(5,0));//构造一个具有指定组件间距的BorderLayout边框布局JPanel jpTop = new JPanel();jpTop.setLayout(new GridLayout(2,2,5,5));JPanel jpbottom= new JPanel();jpbottom.setLayout(new FlowLayout());JLabel lbzh = null,lbmm = null;//声明帐号、密码、标签组件JTextField tfzh, tfmm;//声明输入帐号、密码文本框组件JButton btLogin;//声明登陆按钮组件lbzh=new JLabel("帐号",lbzh.CENTER);//创建组件并赋值lbmm=new JLabel("密码",lbmm.CENTER);tfzh=new JTextField(10);tfmm=new JTextField(10);btLogin=new JButton("登陆");jpTop.add(lbzh);//把组件添加到面板上jpTop.add(tfzh);jpTop.add(lbmm);jpTop.add(tfmm);jpbottom.add(btLogin);jp.add(jpTop,BorderLayout.NORTH);jp.add(jpbottom,BorderLayout.SOUTH);jf.add(jp); }}
