public static void main(String[] args) throws IOException {

System.out.print("Enter a number:");

Scanner in = new Scanner(System.in);

boolean available = in.hasNextInt();

if(!available){

System.out.println("......请输入一个数字......");

}else{

int x = in.nextInt();

System.out.println("输入金额:"+x);

String y = "";

if(x<=3500){

y="不需要交税";

}else if(x > 3500 && x <=5000 ){

y = "应征税:"+((x-3500)*0.03);

}else if(x > 5000 && x <= 8000 ){

y = "应征税:"+((x-5000)*0.1 + 1500*0.03);

}else if(x > 8000 && x <= 12500 ){

y = "应征税:"+((x-8000)*0.2 + 3000*0.1 + 1500*0.03);

}else if(x > 12500 && x <= 15000 ){

y = "应征税:"+((x-12500)*0.25 + 4500*0.2 + 3000*0.1 + 1500*0.03);

}else if(x > 15000 ){

y = "应征税:"+((x-15000)*0.3 + 2500*0.25 + 4500*0.2 + 3000*0.1 + 1500*0.03);

}

System.out.println(y);

}

}