This is a little example about try and catch in Java:
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public class HelloWorld{ public static void main(String []args){ System.out.print("write your number: ");//Info text String str = System.console().readLine();//read input int res = 0; try{ res = Integer.parseInt(str); res *= 2; }catch (Exception e){ System.out.println("Error:"+e); } System.out.println("result:"+res); } } |
Output looks like:
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sh-4.3# java -Xmx128M -Xms16M test write your number: 2 result:4 sh-4.3# java -Xmx128M -Xms16M test write your number: a Error:java.lang.NumberFormatException: For input string: "a" result:0 |
Thanks, good easy solution.
Excellent post. I’m experiencing a few of these issues
too..