mydrawrect2.java

这个是JAVA程序基础书上第7章书实现的代码

import java.awt.*;
import java.awt.event.*;
class MyDrawRect2{
	Frame f = new Frame()	;
	MyCanvas c = new MyCanvas();
	//1~6月的生产数据
	private int m_data[]={440, 520, 400, 680, 320, 600};
	public static void main(String[] args){
		new MyDrawRect2();
	}
	MyDrawRect2(){
		f.setSize(400, 300);
		f.setLayout(new BorderLayout(0, 0));
		f.add(c, BorderLayout.CENTER);
		f.addWindowListener(new MyWindowAdapter());
		f.show();
	}
	class MyCanvas extends Canvas{
		public void paint(Graphics g){
			g.drawString("上半年生产进度统计图", 120, 40);
			Color c = new Color(0x999999);
			g.setColor(c);
			g.drawRect(30, 25, 300, 200);
			//画坐标分隔线
			for (int i=0; i<=7; i++){
				g.drawLine(30, 50 + i*25, 330, 50 + i*25);
				g.drawString(700-i*100+"", 5, 52 + i*25);
			}
			
			//画直方图及数据标志
			for(int i=0; i<6; i++){
				g.setColor(Color.red);
				g.fillRect(50+i*50, 225-m_data[i]/4, 15, m_data[i]/4);
				g.setColor(Color.blue);
				g.drawString(m_data[i]+"", 50 + i*50, 225 - m_data[i]/4);
				g.setColor(Color.green);
				g.drawString(i + 1 + "月", 50 + i*50, 240);
			}
		}
	}
	class MyWindowAdapter extends WindowAdapter{
		public void windowClosing(WindowEvent e){
			System.exit(0);
		}
	}
}