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What is the statement to handle exceptions in java

王林
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2020-06-17 16:22:123993browse

What is the statement to handle exceptions in java

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:

What is the statement to handle exceptions in java

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