tools.java

实现了一个由时间服务器

package timeServer;

import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.Window;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Map;
import java.util.Properties;

import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JFormattedTextField;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JFormattedTextField.AbstractFormatter;
import javax.swing.border.TitledBorder;
import javax.swing.text.MaskFormatter;
import javax.swing.text.NumberFormatter;

public final class Tools {

	public static final char COPYRIGHT_SYMBOL = 0xA9;

	private static BufferedReader reader = new BufferedReader(
			new InputStreamReader(System.in));

	private static boolean DEBUG = false;

	/**
	 * 定位窗体到屏幕中间
	 * 
	 * @param win
	 *            Window 对象
	 */
	public static void center(Window win) {
		Toolkit tkit = Toolkit.getDefaultToolkit();
		Dimension screenSize = tkit.getScreenSize();
		Dimension windowSize = win.getSize();
		if (windowSize.height > screenSize.height) {
			windowSize.height = screenSize.height;
		}
		if (windowSize.width > screenSize.width) {
			windowSize.width = screenSize.width;
		}
		win.setLocation((screenSize.width - windowSize.width) / 2,
				(screenSize.height - windowSize.height) / 2);
	}

	/**
	 * 返回以<code>title</code>为标题的TitledBorder,标题颜色为<code>c</code>
	 * 
	 * @param title
	 *            标题
	 * @param c
	 *            标题颜色
	 * @return TitledBorder对象
	 * @see BorderFactory
	 * @see TitledBorder
	 */
	public static TitledBorder getTitledBorder(String title, Color c) {
		TitledBorder border = BorderFactory.createTitledBorder(title);
		border.setTitleColor(c);
		return border;
	}

	/**
	 * 返回以<code>title</code>为标题的TitledBorder
	 * 
	 * @param title
	 *            标题
	 * @return TitledBorder对象
	 * @see BorderFactory
	 * @see TitledBorder
	 */
	public static TitledBorder getTitledBorder(String title) {
		return BorderFactory.createTitledBorder(title);
	}

	/**
	 * 向布局为GridBagLayout的<code>Container c</code>中添加组件
	 * 
	 * @param c
	 *            容器
	 * @param gridx
	 *            网格布局中的x方向的位置
	 * @param gridy
	 *            网格布局中的y方向的位置
	 * @param gridWidth
	 *            所占网格的宽度
	 * @param gridHeight
	 *            所占网格的高度
	 * @param gbCon
	 *            GridBagConstraints的对象
	 * @param comp
	 *            被添加的组件
	 * @see GridBagLayout
	 * @see GridBagConstraints
	 */
	public static void addComponent(Container c, int gridx, int gridy,
			int gridWidth, int gridHeight, GridBagConstraints gbCon,
			Component comp) {
		gbCon.insets = new Insets(5, 5, 5, 5);
		gbCon.gridx = gridx;
		gbCon.gridy = gridy;
		gbCon.gridwidth = gridWidth;
		gbCon.gridheight = gridHeight;
		c.add(comp, gbCon);
	}
	public static void addComponent(JPanel c, int gridx, int gridy,
			int gridWidth, int gridHeight, GridBagConstraints gbCon,
			Component comp) {
		gbCon.insets = new Insets(5, 5, 5, 5);
		gbCon.gridx = gridx;
		gbCon.gridy = gridy;
		gbCon.gridwidth = gridWidth;
		gbCon.gridheight = gridHeight;
		c.add(comp, gbCon);
	}

	/**
	 * 得到一个输入日期的输入文本域
	 * 
	 * @param df
	 *            SimpleDateFormat的对象
	 * @return JTextField的对象
	 * @see SimpleDateFormat
	 * @see JTextField
	 */
	public static JTextField getDateInputField(SimpleDateFormat df) {
		JFormattedTextField txtField = new JFormattedTextField(df);
		txtField.setColumns(20);
		return txtField;
	}

	/**
	 * 得到一个输入整数的输入文本域
	 * 
	 * @param format
	 *            格式化字符串,使用方法见MaskFormatter
	 * @return 输入文本域
	 * @see MaskFormatter
	 */
	public static JFormattedTextField getIntegerFormattedTextField(String format) {
		AbstractFormatter formatter = null;
		try {
			formatter = new MaskFormatter(format);
			MaskFormatter f = ((MaskFormatter) formatter);
			f.setPlaceholderCharacter('0');
		} catch (Exception e) {
			NumberFormat nf = NumberFormat.getIntegerInstance();
			nf.setGroupingUsed(false);
			formatter = new NumberFormatter(nf);
			e.printStackTrace();
		}
		JFormattedTextField txtField = new JFormattedTextField(formatter);
		txtField.setColumns(20);
		return txtField;
	}

	/**
	 * 得到一个输入整数的文本域
	 * 
	 * @return 输入整数的文本域
	 */
	public static JFormattedTextField getIntegerFormattedTextField() {
		NumberFormat nf = NumberFormat.getIntegerInstance();
		nf.setGroupingUsed(false);
		JFormattedTextField txtField = new JFormattedTextField(nf);
		txtField.setColumns(20);
		return txtField;
	}

	/**
	 * 得到一个输入数,包括整数,浮点数的文本域
	 * 
	 * @return 输入数值的文本域
	 */
	public static JFormattedTextField getNumberInputField() {
		NumberFormat nf = NumberFormat.getNumberInstance();
		nf.setMaximumFractionDigits(10);
		nf.setGroupingUsed(false);
		JFormattedTextField txtField = new JFormattedTextField(nf);
		txtField.setColumns(20);
		return txtField;
	}

	// public static TableCellEditor getIntegerTableCellEditor()
	// {
	// return new DefaultCellEditor(getIntegerFormattedTextField());
	// }

	/**
	 * 得到一个布局为<code>FlowLayout(FlowLayout.LEFT,10,10)</code>的面板, 并浆参数<code>JComponent c</code>添加到面板中
	 * 
	 * @param c
	 *            JComponent的对象
	 * @return 面板
	 */
	public static JPanel getFlowLayoutPanel(JComponent c) {
		return Tools.getFlowLayoutPanel(c, FlowLayout.LEFT);
	}

	/**
	 * 得到一个布局为<code>FlowLayout(align,10,10)</code>的面板, 并浆参数<code>JComponent c</code>添加到面板中
	 * 
	 * @param c
	 *            JComponent的对象
	 * @param align
	 *            面板的对其方式,参加<code>FlowLayout</code>
	 * @return 面板
	 * @see FlowLayout
	 */
	public static JPanel getFlowLayoutPanel(JComponent c, int align) {
		JPanel p = new JPanel(new FlowLayout(align, 10, 10));
		p.setOpaque(false);
		p.add(c);
		return p;
	}

	/**
	 * 得到文件的后缀名
	 * 
	 * @param file
	 *            文件名(可以带有路径)
	 * @return 文件后缀,如果没有后缀返回null
	 */
	public static String getFileType(String file) {
		int index = file.lastIndexOf('.');
		if (index == -1)
			return null;
		else
			return file.substring(index + 1, file.length());
	}

	/**
	 * 得到除文件后缀的文件名
	 * 
	 * @param file
	 *            完整文件名(可以包含路径)
	 * @return 除去文件后缀的文件名
	 */
	public static String getFileName(String file) {
		int index = file.lastIndexOf('.');
		if (index == -1)
			return file;
		else
			return file.substring(0, index);
	}

	/**
	 * 得到修改文件后缀的文件名
	 * 
	 * @param file
	 *            源文件名
	 * @param type
	 *            文件后缀
	 * @return 修改文件后缀后的文件名
	 */
	public static String changeFileType(String file, String type) {
		String name = getFileName(file);
		return name + "." + type;
	}

	/**
	 * 拷贝文件
	 * 
	 * @param src
	 *            源文件路径
	 * @param dst
	 *            目的文件路径
	 */
	public static void copyFile(String src, String dst) {
		try {
			FileInputStream in = new FileInputStream(src);
			FileOutputStream out = new FileOutputStream(dst);
			byte[] buffer = new byte[8192];
			while ((in.read(buffer)) != -1) {
				out.write(buffer);
			}
			out.flush();
			out.close();
			in.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 打印数组到标准输出
	 * 
	 * @param arr
	 *            数组
	 */
	public static void printArray(Object[] arr) {
		for (int i = 0; i < arr.length; i++) {
			System.out.print(arr[i] + " ");
		}
		System.out.println();
	}

	public static void printArray(double[][] arr) {
		for (int i = 0; i < arr.length; i++) {
			for (int j = 0; j < arr[0].length; j++)
				System.out.print(arr[i][j] + " ");
			System.out.println();
		}
	}

	/**
	 * 打印Map的内容,包括key和value,打印形式为key->value
	 * 
	 * @param map
	 */
	public static void printMap(Map<?, ?> map) {
		if (map.size() == 0) {
			System.out.println("Empty map");
			return;
		}
		for (Object ele : map.keySet()) {
			System.out.println(ele + " -> " + map.get(ele));
		}
	}

	/**
	 * 打印系统属性
	 */
	public static void printSystemProperties() {
		Properties p = System.getProperties();
		printMap(p);
	}

	public static void enableDebug(boolean b) {
		DEBUG = b;
	}

	public static void DEBUG(String str) {
		if (DEBUG) {
			System.out.println(str);
		}
	}

	public static String readLine() {
		String line = null;
		try {
			line = reader.readLine();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return line;
	}

	public static int readInt() {
		String input = readLine();
		return Integer.parseInt(input.trim());
	}

	public static double readDouble() {
		String input = readLine();
		return Double.parseDouble(input.trim());
	}

}