java异常的一个题目

1.编写异常类：空异常、年龄低异常、年龄高异常、 工资低异常、工资高异常、身份证非法异常。 
2.编写一个员工类: 
(1)属性： 编号、姓名、年龄、工资、身份证号码、员工人数（10）、员工工资总额（10000）。 
(2)构造器： 
构造器1：设置编号、年龄、姓名，如果年龄小于18，抛出年龄低异常；如果年龄大于60，抛出年龄高异常；如果姓名为null或为空字符串，抛出空异常。 
构造器2：设置工资、设置身份证号码，如果工资低于600，抛出工资低异常； 如果身份证不是18位，抛出身份证非法异常。 
(3)方法 
增加工资 addSalary(double addSalary)，抛出工资高异常，当增加后的工资大于员工工资总额时，抛出此异常。 
减少工资 minusSalary(double minusSalary)，抛出工资低异常，当减少后的工资低于政府最低工资时，抛出工资低异常。 
显示员工工资总额方法：showTotalSalary()，抛出空异常，当工资总额为0时，抛出此异常。 
显示员工人数：showTotalEmployee()，抛出空异常，当员工人数为0时，抛出此异常 。

3.编写main主测试类。

代码如下：

package com.Test12;
//首先创建6个异常类
class LowAgeException extends Exception{
	public LowAgeException(String message) {
		super(message);
	}
}
class HeightAgeException extends Exception{
	public HeightAgeException(String message) {
		super(message);
	}
}
class NullException extends Exception{
	public NullException(String message) {
		super(message);
	}
}
class LowSalaryException extends Exception{
	public LowSalaryException(String message) {
		super(message);
	}
}
class HighSalaryException extends Exception{
	public HighSalaryException(String message) {
		super(message);
	}
}
class IdCardException extends Exception{
	public IdCardException(String message) {
		super(message);
	}
}
//员工类
class Employee{
    private int id;
    private String name;
    private int age;
    private double salary;
    private String idCard;
    private int totalEmployee = 10;
    private double totalSalary = 100000;
    public Employee(int id,String name,int age)throws Exception{
    	if(age<18) {
    		throw new LowAgeException("年龄太小了!");
    	}else if(age>60) {
    		throw new HeightAgeException("年龄太高了!");
    	}else if((name==null)||name==""){
    		throw new NullException("姓名不能为空!");
    	}
    }
    public Employee(double salary,String idCard) throws Exception{
    	this.salary=salary;
    	if(salary<600) {
    		throw new LowSalaryException("工资太低了!");
    	}else if(idCard.length()!=18) {
    		throw new IdCardException("身份证非法!");
    	}
    }
    //增加工资
    public void addSalary(double addSalary) throws Exception{
    	double nowSalary=salary+addSalary;
    	System.out.println("增加后的工资是:"+nowSalary);
    	if(nowSalary>totalSalary) {
    		throw new HighSalaryException("工资增加后太高了!");
    	}
    }
    //减少工资
    public void minusSalary(double minusSalary) throws Exception{
    	double nowSalary=salary-minusSalary;
    	System.out.println("减少后的工资是:"+nowSalary);
    	if(nowSalary<600) {
    		throw new HighSalaryException("工资减少后太低了!");
    	}
    }
    //显示员工工资总额
    public void showTotalSalary()throws Exception {
    	if(totalSalary==0) {
    		throw new IdCardException("工资总额为0!");
    	}
    }
    //显示员工人数
    public void showTotalEmployee()throws Exception {
    	if(totalEmployee==0) {
    		throw new IdCardException("员工人数为0!");
    	}
    }
}

public class Test12_6 {
	public static void main(String[] args) {
		try {
			Employee e1=new Employee(201801,"小青",26);
			Employee e2=new Employee(655,"123456789987654321");
			e2.addSalary(1000);
			e2.minusSalary(100);
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			System.out.println("欢迎使用本系统！");
		}
	}
}