计算器图形窗体图标和位置确定的类

[java]代码库

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package calc;

import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JFrame;

/**
 *
 * @author xiao
 */
public class Ui {
    private Ui() { };
    
    //修改窗体的图标
    public static void setFrameIamge(JFrame jf){
        
        //获取工具类对象
        Toolkit tk = Toolkit.getDefaultToolkit();
        
        //获取图片
        Image i = tk.getImage("src\\resource\\timg.jpg");
        
        jf.setIconImage(i);
        
        

        
    }
     //设置程序窗体居中
    public static void setFrameCenter(JFrame jf) {
        //获取工具对象
       Toolkit tk = Toolkit.getDefaultToolkit();
        
        //获取屏幕size
        Dimension d = tk.getScreenSize();
        double screenWidth = d.getWidth();
        double screenHeight = d.getHeight();
        
        //获取窗体size
        int frameWidth = jf.getWidth();
        int frameHeight = jf.getHeight();
        
        //计算实际位置
        int Width = ((int)screenWidth + frameWidth)/2;
        int Height = ((int)screenWidth + frameHeight)/2;
        
        //设置窗体坐标
        jf.setLocation(500,400);
       // jf.setLocation(Width,Height);
        
  
        
    }
}