在按钮上绘画图形.rar_java 画图

该组件可以任意在按钮上绘画你需要的形状(Shape），具体代码如下： import javax.swing.*; import java.awt.*; public class JXButton extends JButton { final public static int UP = 0; final public static int DOWN = 1; final public static int LEFT = 2; final public static int RIGHT = 3; final private static int SPACES = 3; private Dimension size = new Dimension(20,10); private int type = 0; public JXButton(Dimension size) { super(); this.size = size; setFocusPainted(false); //setBorderPainted(false); } public JXButton(int type,int width,double height) { this(new Dimension(width,(int)height)); this.type = type; } public JXButton(int width,int height) { this(new Dimension(width,height)); } public JXButton(int type,int width,int height) { this(new Dimension(width,height)); this.type = type; } public Dimension getPreferredSize() { return size; } public void setDisplay(int type) { this.type = type; repaint(); } public void paintComponent(Graphics g) { Dimension ds = getSize(); int x0 = -1,y0 = -1; int x1 = -1,y1 = -1; int x2 = -1,y2 = -1; g.clearRect(0,0,ds.width,ds.height); switch(type) { case UP: x0 = ds.width / 2 ; y0 = SPACES; x1 = SPACES ; y1 = ds.height - SPACES; x2 = ds.width - SPACES ; y2 = ds.height - SPACES; break; case DOWN: x2 = 1; ; y2 = SPACES; x0 = ds.width / 2 ; y0 = ds.height - SPACES; x1 = ds.width - SPACES ; y1 = SPACES; break; case LEFT: x0 = SPACES ; y0 = ds.height / 2; x1 = ds.width - SPACES ; y1 = ds.height - SPACES; x2 = ds.width - SPACES ; y2 = SPACES; break; case RIGHT: x1 = SPACES ; y1 =SPACES; x2 = SPACES ; y2 = ds.height - SPACES; x0 = ds.width - SPACES ; y0 = ds.height / 2; break; } //根据三点坐标开始画三角形 if(x1==x2 && x1>0) { //横坐标相等 for(int i = Math.min(y1,y2);i<=Math.max(y1,y2);i++) { g.drawLine(x0,y0,x1,i); } } else if(y1==y2 && y1>0) { //纵坐标相等 for(int i = Math.min(x1,x2);i<=Math.max(x1,x2);i++) { g.drawLine(x0,y0,i,y1); } } g.drawLine(x1,y1,x2,y2); //super.paintComponents(g); } }; 如果在重写paintBorder就可以画各种形状的按钮了 // 用简单的弧画按钮的边界。 protected void paintBorder(Graphics g) { g.setColor(getForeground()); g.drawOval(0, 0, getSize().width-1, getSize().height-1); }