我要评论本文实例为大家分享了swing实现可动态刷新的验证码的具体代码，供大家参考，具体内容如下
不多，code代码如下：
import java.awt.color;
import java.awt.font;
import java.awt.graphics;
import java.awt.toolkit;
import java.awt.event.mouseadapter;
import java.awt.event.mouseevent;
import java.util.random;
import javax.swing.jframe;
public class checkcode extends jframe {
private static random random = new random();
private int width = 53;//验证码宽度
private int height =25;//验证码高度
private int font_size = 20;//验证码颜色
private int x = 100;//验证码所在窗体x坐标
private int y = 100;//验证码所在窗体y坐标
private int jam = 5;//干扰元素 建议使用 4~7 之间的数字
private string code = "";//保存验证码
public checkcode(){//初始化窗体信息
super("验证码");
setvisible(true);
setbounds((toolkit.getdefaulttoolkit().getscreensize().width-300)/2, (toolkit.getdefaulttoolkit().getscreensize().height-300)/2, 300, 200);
setdefaultcloseoperation(exit_on_close);
addmouselistener(new mouseadapter() {
public void mouseclicked(mouseevent e) {
repaint();
}
});
}
public color getrandomcolor(){//获得随机颜色
int r=random.nextint(255),g=random.nextint(255),b=random.nextint(255);
return new color(r,g,b);
}
public string getrandomstring(){//获得验证码
int num = random.nextint(9);
code = num+"";
return num+"";
}
public void checkcode(graphics g){// 绘画验证码
drawborder(g);
drawcode(g);
drawjam(g);
}
public void drawborder(graphics g){//绘画边框和背景
color gc = g.getcolor();
g.setcolor(color.white);
g.fillrect(x, y, width, height);
g.setcolor(color.black);
g.drawrect(x, y, width, height);
g.setcolor(gc);
}
public void drawcode(graphics g){//绘画验证码内容
color gc = g.getcolor();
for(int i=0;i<4;i++){
g.setcolor(getrandomcolor());
g.setfont(new font("宋体",font.bold,font_size));
g.drawstring(getrandomstring(), x+5+(i*12), y+font_size);
}
g.setcolor(gc);
}
public void drawjam(graphics g){//绘画干扰元素
color gc = g.getcolor();
for(int i=0;i<jam;i++){
g.setcolor(getrandomcolor());
g.drawline(x+random.nextint(width), y+random.nextint(height), x+random.nextint(width), y+random.nextint(height));
}
g.setcolor(gc);
}
public void paint(graphics g) {
color c = g.getcolor();
g.drawstring("单击可刷新验证码", 30, 50);
checkcode(g);
g.setcolor(c);
}
public static void main(string[] args) {
new checkcode();
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
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