Java程序导出成.jar文件、生成.exe可执行文件及打包成可执行安装程序（可在无Java环境的计算机上运行）--以个人所得税计算器为例

package math;
import javax.swing.JOptionPane;
//凯鲁嘎吉 http://www.cnblogs.com/kailugaji/
public class WRRTax {
	public static void main( String args[] )
	   {
	      String money;   //输入您的收入
	      double x,y;
		  double tax=0;
		  JOptionPane.showMessageDialog(null, "个人所得税计算器\n"+"制作人:"+"凯鲁嘎吉\n"+"http://www.cnblogs.com/kailugaji/\n"+"欢迎使用！");
		  money =
	         JOptionPane.showInputDialog( "请输入您的收入(单位：元)：" );
	      // convert numbers from type String to type int
		  x=Double.parseDouble(money);      
	      y=x-3500;
	      if(y<=0)
	    	  tax=0;
	      else if(y<=1500)
	    	    tax=y*0.03;
	      else if((y>1500)&(y<=4500))
	    	    tax=1500*0.03+(y-1500)*0.1;
	      else if((y>4500)&(y<=9000))
	    	    tax=1500*0.03+3000*0.1+(y-4500)*0.2;
	      else if((y>9000)&(y<=35000))
	    	    tax=1500*0.03+3000*0.1+4500*0.2+(y-9000)*0.25;
	      else if((y>35000)&(y<=55000))
	    	    tax=1500*0.03+3000*0.1+4500*0.2+35000*0.25+(y-35000)*0.3;
	      else if((y>55000)&(y<=80000))
	    	    tax=1500*0.03+3000*0.1+4500*0.2+35000*0.25+55000*0.3+(y-55000)*0.35;
	    	else if(y>80000)
	    	    tax=1500*0.03+3000*0.1+4500*0.2+35000*0.25+55000*0.3+800000*0.35+(y-80000)*0.45; 
	      JOptionPane.showMessageDialog(null, "您应缴税款为："+tax +"元！");
	      JOptionPane.showMessageDialog(null, "谢谢使用，再见！");

	   }
}