jb1标签和time标签两个的位置只有一个是正确的,jb1的位置正确则time的位置错误,time的位置正确则jb1的位置错误
源代码如下:
public class Testmenu extends JFrame
{
Timer timer;
public Testmenu()
{
setSize(1000,600);
setLocation(250,95);
setUndecorated(true); //去除边框,但无法拖动窗口
setResizable(false); //是否可改变窗口大小
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
init();
timeshow();
}
public void init()
{
JLabel jb1=new JLabel("图书馆");
jb1.setBounds(400, 50, 200, 100);
jb1.setFont(new Font("宋体",Font.BOLD,50));
this.add(jb1);
JButton out=new JButton("退出"); //退出按钮
out.setBounds(925,0,75,50);
this.add(out);
out.setBorderPainted(true); //边界是否可见
out.addActionListener(event->this.dispose());
}
public void timeshow()
{
JLabel time=new JLabel();
time.setFont(new Font("宋体",Font.BOLD,15));
time.setBounds(800,500,300,20);
this.add(time);
timer = new Timer(1000, (e)->{
SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
time.setText(sdf.format(new Date()).toString());
});
timer.start();
}
}