常见的运行时异常

我就是我 2022-02-12 16:09 234阅读 0赞

## 常见的运行时异常 ##

ArithmeticException => 算术异常		
    NegativeArraySizeException => 负数数组大小异常
    ArrayIndexOutOfBoundsException => 数组索引值超出边界异常
    StringIndexOutOfBoundsException => 字符串索引值超出边界异常
    IndexOutOfBoundsException => (集合)索引值超出边界异常
    NullPointerException => 空指针异常 
    ClassCastException => 类型造型异常
    NumberFormatException => 数字格式异常

IllegalArgumentException => 非法参数异常  
IllegalStateException => 非法状态异常  
ConcurrentModificationException => 并发修改异常

import java.util.*;
    public class TestRuntimeException{
    	public static void main(String[] args){
    		//ConcurrentModificationException => 并发修改异常
    
    		//IllegalStateException => 非法状态异常
    		List<Integer> list3 = new ArrayList<>(3);
    		Collections.addAll(list3,55,33,11);
    		Iterator<Integer> car = list3.iterator();
    		car.remove();
    
    		//IndexOutOfBoundsException => 索引值超出边界异常
    		List<Integer> list2 = new ArrayList<>(3);
    		Collections.addAll(list2,11,22,33);
    		System.out.println(list2.get(3));
    
    		//IllegalArgumentException => 非法的参数异常
    		List<Integer> list = new ArrayList<>(-5);
    
    		//ClassCastException => 类型造型异常
    		Object stu = new Student();
    		Cacti cc = (Cacti)stu;
    
    		//StringIndexOutOfBoundsException => 字符串索引值超出边界异常
    		String str2 = "ETOAK";
    		System.out.println(str2.charAt(5));
    
    		//NumberFormatException => 数字格式异常
    		String price = "123a";
    		int x = Integer.parseInt(price);
    		System.out.println(x + 3);
    
    		//NullPointerException => 空指针异常
    		String str = null;
    		System.out.println(str.toUpperCase());
    
    		//ArrayIndexOutOfBoundsException => 数组索引值超出边界异常 = 下标越界
    		int[] data2 = new int[]{11,22,33};
    		System.out.println(data2[4]);
    
    		//NegativeArraySizeException => 负数的数组大小异常
    		int[] data1 = new int[-7];
    
    		//ArithmeticException => 算术异常
    		System.out.println(5/0);
    	}
    }
    class Student{}
    class Cacti{}//仙人球