异常与自定义异常

自定义一个异常，在这个异常中声明了一个属性age，一个方法getOverAge

public class OverageException extends Exception{
	private int age;

	public OverageException(int age) {
		super();
		this.age = age;
	}
	public int getOverAge(){
		return age;
	}
}

一个User类

public class User {

	private String name;
	private int age;
	public User(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}
	public User() {
		super();
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age){
		this.age = age;
	}

User类中含有一个show方法，在其中进行age值的判断

public void show() throws OverageException{
		if(this.age>=0&&this.age<=120)
		{
			System.out.println("姓名："+this.name);
			System.out.println("年龄："+this.age);
			return;
		}
		System.out.println("年龄须在0至120之间");
		throw new OverageException(age);

	}

测试类

public class Demo_Age {
	public static void main(String[] args){
		User us = new User("lili",130);
		try {
			us.show();
		} catch (OverageException e) {
			System.out.println("年龄是："+e.getOverAge());
			e.printStackTrace();
		}finally{
			System.out.println("程序结束");
		}
	}

}

测试结果