Java 实验二——异常

拼搏现实的明天。 2022-12-22 08:53 70阅读 0赞

public class Main 
    { 
    	static void proc() throws IllegalAccessException 
    	{ 
    		System.out.println("inside proc");
    		throw new IllegalAccessException("demo");
    	}
    
    	public static void main(String[] args) 
    	{ 
    		try
    		{ 
    			proc();
    		}
    		
    		catch (IllegalAccessException e) 
    		 { 
    			System.out.println("捕获" + e);
    		}
    	}
    	
    }

class NoLowerLetter extends Exception
    //类声明，声明一个Exception的子类NoLowerLetter
    { 
    	public void print() { 
    		System.out.printf("%c", '#');
    	}
    }
    
    class NoDigit extends Exception
    //类声明，声明一个Exception的子类NoDigit
    { 
    	public void print() { 
    		System.out.printf("%c", '*');
    	}
    }
    
    class People { 
    	void printLetter(char c) throws NoLowerLetter { 
    		if (c < 'a' || c > 'z') { 
    			NoLowerLetter noLowerLetter = new NoLowerLetter();// 创建NoLowerLetter类型对象
    
    			throw noLowerLetter;// 抛出noLowerLetter
    		} else { 
    			System.out.print(c);
    		}
    	}
    
    	void printDigit(char c) throws NoDigit { 
    		if (c < '1' || c > '9') { 
    			NoDigit noDigit = new NoDigit();// 创建NoDigit类型对象
    
    			throw noDigit;// 抛出noDigit
    		} else { 
    			System.out.print(c);
    		}
    	}
    }
    
    public class Main { 
    
    	public static void main(String[] args) { 
    		People people = new People();
    		for (int i = 0; i < 128; i++) { 
    			try { 
    				people.printLetter((char) i);
    			} catch (NoLowerLetter e) { 
    				e.print();
    			}
    		}
    		for (int i = 0; i < 128; i++) { 
    			try { 
    				people.printDigit((char) i);
    			} catch (NoDigit e) { 
    				e.print();
    			}
    		}
    
    	}
    }

Java 实验二——异常

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