java小白——抛出异常再应用

旧城等待， 2023-06-13 04:42 3阅读 0赞

任务一：  
创建一个异常处理的类，程序中首先输出"这是一个异常处理的例子"，然后在程序中主动产生一个“ArithmeticException”类型被“0”除的异常，并用“catch”语句捕获这个异常。最后通过“ArithmeticException”类的对象e的方法“getMessage”给出异常的具体类型并显示出来。finally中给出最后的输出语句。

package qaq;
    import java.util.Scanner;
    public class Test5 {
        
     static double Div(double x,double y){
        
    	 if(y == 0)throw (new ArithmeticException("0不能做除数"));
    	 return x/y;
     }
    	public static void main(String[] args) {
        
    	Scanner sc = new Scanner(System.in);
    	double x = sc.nextDouble();
    	double y = sc.nextDouble();
    	try{
        
    		double result = Div(x,y);
    		System.out.println(result);
    		
    	}catch(ArithmeticException e){
        
    		System.out.print(e.getMessage());
    	}
    	finally{
        
    		System.out.println("Finally:must go inside finally");
    	}
    			
    
    	}
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTE3NDIwOA_size_16_color_FFFFFF_t_70]任务二：  
用户输入数字代表天，如果数字值在1-7之间，提示今天是数字对应的星期几，如果输入数字不是1-7之间，则抛出异常；

package qaq;
    import java.util.Scanner;
    public class Test4 {
        
     static int Div(int x){
        
    	 if(x <= 0 ||x >7) throw (new RuntimeException("请输入1-7以内的编号"));
    	 return x;
     }
    	public static void main(String[] args) {
        
    		Scanner sc = new Scanner(System.in);
    		int n = sc.nextInt();
    		try{
        
    			int x = Div(n);
    		switch(x){
        
    		case 1:
    			System.out.print("周一");
    		break;
    		case 2:
    			System.out.print("周二");
    		break;
    		case 3:
    			System.out.print("周三");
    		break;
    		case 4:
    			System.out.print("周四");
    		break;
    		
    		case 5:
    			System.out.print("周五");
    		break;
    		case 6:
    			System.out.print("周六");
    		break;
    		case 7:
    			System.out.print("周天");
    		break;
    		
    		}
    		}catch(RuntimeException e){
        
    			System.out.print(e.getMessage());
    		}
    		
    
    	}
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTE3NDIwOA_size_16_color_FFFFFF_t_70 1]

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