例1 Applet中写字和画图的基本方法。 import java.awt.*; import java.applet.*; public class DrawBasic extends Applet { public void paint(Graphics g) { g.drawString("用Graphics写字和画图的基本方法", 20,40); g.drawOval(100, 100, 30, 30); g.drawOval(200, 100, 40, 25); g.drawLine(20, 140, 200,140); g.drawRect(20, 160, 50, 80); } } 在窗口显示文字用 g.drawString(String, intX, intY); drawLine(int,int,int,int) 画直线。起点坐标,终点坐标; drawRect(int,int,int,int) 画矩形。左角坐标,宽,高; drawRoundRect(int,int,int,int,int,int) 画圆角矩形。左角坐标,X宽,Y高,深度X,深度Y; draw3DRect(int,int,int,int,boolean) 画3D矩形。左角坐标,宽X,高Y,ture; drawOval(int,int,int,int) 画卵形。中心坐标,长轴,短轴 ; drawArc(int,int,int,int,int,int) 画弧。左角坐标,宽,高,起始角,终止角; drawPolyline(int[],int[],int) 画折线。各点的X坐标,Y坐标,折线数 ; drawPolygon(int[],int[],int) 画多角形。各点的X坐标,Y坐标,边数; drawPolygon(Polygon) 画多角形。定义好的多角形对象;
例2 设置颜色和字体。 import java.awt.*; import java.applet.*; public class FontDemo extends Applet { public void paint (Graphics g){ String s1 = "This Font is "; Font font = new Font("Arial", Font.BOLD, 18); g.setColor(Color.red); setBackground(new Color(0,255,0)); g.setFont(font); g.drawString(s1 + font.getName() ,20, 60); g.setFont(new Font("隶书", Font.BOLD, 28)); g.drawString("现在是隶书" ,20, 120); g.setColor(new Color(0,0,0)); } }
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