package com.epgis.demo;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;public classMyTest extends JPanel {/** **/
private static final long serialVersionUID = -160117449327146673L;public voidpaintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2=(Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Font ft= new Font("SansSerif", 0, 200);
g2.setFont(ft);//获得字体宽度方法一
FontMetrics fm =g2.getFontMetrics();
Rectangle2D rc= fm.getStringBounds("By", g2);
System.out.println("Width:" +rc.getWidth());
Rectangle2D rcb= fm.getStringBounds("B", g2);
System.out.println("Width:" +rcb.getWidth());
Rectangle2D rcy= fm.getStringBounds("y", g2);
System.out.println("Width:" +rcy.getWidth());//获得字体宽度方法二
FontMetrics fm2 = Toolkit.getDefaultToolkit().getFontMetrics(ft);//已过时
System.out.println("Width:" + fm2.stringWidth("By"));///
int baseline = 300;
g2.drawString("By", 200, baseline);
g2.setColor(Color.red);
g2.setFont(new Font("SansSerif", 0, 15));绘制宽度
g2.drawLine(200, 0, 200, 800);
g2.drawLine(200+(int) rcb.getWidth(), 0, 200+(int) rcb.getWidth(), 800);
g2.drawLine(200 + (int) rc.getWidth(), 0, 200 + (int) rc.getWidth(),800);
g2.drawString("Width", 200 + (int) rcb.getWidth() / 2-10, baseline + 58);
g2.drawString("Width", 200 + (int) rcb.getWidth()+(int)rcy.getWidth() / 2-10, baseline + 58);//可以看出Height = Ascent + Descent + Leading
int ascent =fm.getAscent();int descent =fm.getDescent();int leading =fm.getLeading();int height =fm.getHeight();
System.out.printf("Height = %d\tAscent = %d\tDescent = %d\tLeading = %d", height,
ascent, descent, leading);
System.out.println();//在文字上绘制每一个常量,用一条横线予以标注
g2.drawLine(100, baseline, 500, baseline);
g2.drawLine(100, baseline - ascent, 500, baseline -ascent);
g2.drawLine(100, baseline + descent, 500, baseline +descent);
g2.drawLine(100, baseline - ascent - leading, 500, baseline -ascent-leading);//指出基线的位置,和其他常量作用的范围。
g2.drawString("Baseline", 510, baseline);
g2.drawLine(480, baseline - ascent, 480, baseline);//绘出Ascent的范围
g2.drawString("Ascent", 510, baseline - ascent / 2);
g2.drawLine(480, baseline, 480, baseline +descent);//绘出Descent的范围
g2.drawString("Descent", 510, baseline + descent / 2);//绘出Leading的范围
g2.drawLine(480, baseline - ascent, 480, baseline - ascent -leading);
g2.drawString("Leading", 510, baseline - ascent - leading / 2);//绘出Height的范围
g2.drawLine(100, baseline - ascent - leading, 100, baseline +descent);
g2.drawString("Height", 30, baseline - ascent - leading + height / 2);
}public static voidmain(String[] args) {
JFrame frame= newJFrame();
frame.setTitle("Show Font's Metrics Info");
frame.addWindowListener(newWindowAdapter() {public voidwindowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.setContentPane(newMyTest());
frame.setSize(800, 500);
frame.setVisible(true);
}
}