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JAVA uses the try-catch statement to handle exceptions.
Place possible exception operations in the try part of try-catch. Once the try part throws an exception object, or calls a method that may throw an exception object, and the method throws an exception object , then try ends execution immediately and turns to the catch part. Therefore, the program places the processing after an exception occurs in the catah part.
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Let’s look at the following example:
try{ 包含可能发生异常的语句//正常业务逻辑代码 } catch(ExceptionSubClass1 e){ ...//当try发生异常,将执行catch代码,若无异常,不执行 } catch(ExceptionSubClass2 e){ ... }
Debugging:
public class text1 { public static void main(String[] args) { int n=0,m=0,t=1000; try { m=Integer.parseInt("8888"); n=Integer.parseInt("ab89");//发声异常,转向catch t=7777;//t没有机会执行 } catch(NumberFormatException e) { System.out.println("发生异常:"+e.getMessage()); } } }
Run Result:
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