java基础知识(三)

标签：

• 你好
• 代码

package com.lky;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.util.Calendar;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

public class closeComputer extends JFrame
{
	private JPanel panel_main = new JPanel(new BorderLayout(5, 10));
	private JPanel panel_subnorth = new JPanel(new FlowLayout(3));
	private JPanel panel_subcenter = new JPanel(new FlowLayout(1, 5, 5));
	private JButton countdown = new JButton("倒计时关机");
	private JButton time = new JButton("定时关机");
	private JButton cancel = new JButton("取消关机");
	private JLabel tag;
	String key;

	public closeComputer()
	{
		this.getContentPane().add(panel_main);

		panel_main.add(panel_subnorth, BorderLayout.NORTH);
		panel_main.add(panel_subcenter, BorderLayout.CENTER);
		panel_subnorth.add(tag = new JLabel("请选择关机方式:"));
		panel_subcenter.add(countdown);
		panel_subcenter.add(time);
		panel_subcenter.add(cancel);

		countdown.addActionListener(new Button1Hander());
		time.addActionListener(new Button2Hander());
		cancel.addActionListener(new Button3Hander());
	}

	public void time()
	{
		Calendar calendar = Calendar.getInstance();
		int h = calendar.get(Calendar.HOUR);
		int m = calendar.get(Calendar.MINUTE);
		int s = calendar.get(Calendar.SECOND);// 获取当前系统时间

//		String a = String.valueOf(h);

		int hour, minute, secord;
		String hourtmp, minutetmp, secordtmp;

		hourtmp = JOptionPane.showInputDialog(this, "请输入关机的小时(12小时制)", "输入", 1);
		minutetmp = JOptionPane.showInputDialog(this, "请输入关机的分钟", "输入", 1);
		secordtmp = JOptionPane.showInputDialog(this, "请输入关机的秒钟", "输入", 1);

		hour = Integer.parseInt(hourtmp);
		minute = Integer.parseInt(minutetmp);
		secord = Integer.parseInt(secordtmp);

		long set_time = timesum(hour, minute, secord);
		long currently_time = timesum(h, m, s);

		long discrepancy_time = set_time - currently_time;
		if (discrepancy_time < 0)
		{
			try
			{
				Runtime.getRuntime().exec("shutdown -s");
			} catch (IOException e)
			{
				e.printStackTrace();
			}
		} else
		{
			countTimeTool.deleyTime(discrepancy_time);
			JOptionPane.showMessageDialog(this, "恭喜你,设置成功!", "确认", 2);
		}
	}

	private class Button1Hander implements ActionListener
	{

		@Override
		public void actionPerformed(ActionEvent arg0)
		{
			countdown();
		}

	}

	private class Button2Hander implements ActionListener
	{

		@Override
		public void actionPerformed(ActionEvent arg0)
		{
			time();
		}

	}

	private class Button3Hander implements ActionListener
	{

		@Override
		public void actionPerformed(ActionEvent arg0)
		{
			cancel();
		}

	}

	public void countdown()
	{
		key = JOptionPane.showInputDialog(this, "请输入倒计时关机的时间(秒)", "输入框", 1);
		countTimeTool.deleyTime(Long.parseLong(key));
	}

	public int timesum(int h, int m, int s)
	{
		int sum = h * 3600 + m * 60 + s;
		return sum;
	}// 计算出时间总和，并返回

	public void cancel()
	{
		try
		{
			JOptionPane.showMessageDialog(this, "你已经成功取消了关机操作!", "消息", 2);
			Runtime.getRuntime().exec("shutdown -a");
		} catch (IOException e)
		{
		}
	}

	public static void main(String[] args)
	{
		closeComputer frame = new closeComputer();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setSize(320, 120);
		frame.setTitle("关机工具");
		frame.setLocation(350, 350);
		frame.setVisible(true);
		frame.setResizable(false);
	}

}

java基础知识(三)

标签：

原文地址：http://www.cnblogs.com/dmir/p/4732508.html