第5次java作业

最新推荐文章于 2020-11-15 00:10:33 发布

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最新推荐文章于 2020-11-15 00:10:33 发布

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文章标签： java

原文链接：http://www.cnblogs.com/mylyqc/p/11001245.html

本文详细介绍了Java中异常处理的基本用法，包括如何使用try-catch-finally语句来捕获和处理运行时异常，如算术异常和输入不匹配异常。同时，深入探讨了自定义异常类，如IllegalArgumentException，并通过Person类的实例展示了如何在方法中抛出并捕获这些异常。

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package work; import java.util.Scanner; public class ExceptionTest { public static void main(String[] args) { Scanner in = new Scanner(System.in); double n1 = in.nextDouble(); double n2 = in.nextDouble(); 11 double result; 12 try{ 13 result = n1/n2; 14 System.out.println(result); 15 }catch(ArithmeticException e){ 16 e.printStackTrace(); 17 }finally{ 18 System.out.println("finally"); 19 } 20 in.close(); 21 } 22 23 } 1 package work; 2 3 import java.util.InputMismatchException; 4 import java.util.Scanner; 5 6 public class Work2 { 7 public static void main(String[] args) { 8 Scanner in = new Scanner(System.in); 9 double radius; 10 try{ 11 radius = in.nextDouble(); 12 System.out.println(radius); 13 }catch(InputMismatchException e) 14 { 15 System.out.println("你输入的数据有点问题"); 16 } 17 } 18 } 1 package work; 2 3 public class Person { 4 private String name; 5 private int age; 6 private String id; 7 public String getName() { 8 return name; 9 } 10 public void setName(String name) { 11 this.name = name; 12 } 13 public int getAge() { 14 return age; 15 } 16 public void setAge(int age) { 17 this.age = age; 18 } 19 public String getId() { 20 return id; 21 } 22 public void setId(String id) throws IllegalArgumentException{ 23 if(id.length()!=18) 24 { 25 throw(new IllegalArgumentException()); 26 } 27 this.id = id; 28 } 29 } 1 package work; 2 3 public class IllegalArgumentException extends Exception{ 4 5 } 1 package work; 2 3 public class ExceptionTest2 { 4 5 public static void main(String[] args) { 6 Person p1 = new Person(); 7 Person p2 = new Person(); 8 try { 9 p1.setId("430122200009190315"); 10 p2.setId("110110110"); 11 } catch (IllegalArgumentException e) { 12 System.out.println("长度有误"); 13 } 14 15 16 } 17 18 }

转载于:https://www.cnblogs.com/mylyqc/p/11001245.html