java 第46节 异常的分类

package com.java1995;

public class ClassCastExceptionTest {
    
    public static void main(String[] args) {
        
//        String a="123a";
//        int b=Integer.parseInt(a);
        People p1=new Student();
        Student s1=(Student)p1;
        /**
         * 空指针异常NullPointerException
         */
//        s1=null;
//        s1.run();
        /**
         * 类型转换异常ClassCastException
         */
//        Teacher t1=(Teacher)p1;
        /**
         * 数组越界异常ArrayIndexOutOfBoundsException
         */
//        int[] arr=new int[]{1,2,3};
//        int temp=arr[5];
    }

}

class People{
    
}

class Student extends People{
    
    private String name;
    private int age;
    
    public void run(){
        System.out.println("跑吧");
    }
}
class Teacher extends People{
    
}