public class Main { public static void main(String[] args) { try {//追踪这些可能有问题的语句 System.out.println(tax(2000, 0.1)); System.out.println(tax(-200, 0.1)); System.out.println(tax(2000, -0.1)); } catch (Exception e) {//捕捉上述程序中的异常 e.printStackTrace();// throw e; } } static double tax(int salary, double rate) { // TODO: 如果传入的参数为负,则抛出IllegalArgumentException if (salary<0 || rate<0) { throw new IllegalArgumentException();//如果遇到负数就抛出该不合法参数异常 } return salary * rate; } }
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_我是来微博看美女的