try/catch, catch doesn't respond

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this method must check if there is numbers in string/otherwise it should text in console"not a number" but it doesn't; help me to check it out pls!

public static int[] findNumbers(String text){
    String[]str=text.split(" ");
    int count =0;
    for (String s:str){
        if (isNumeric(s)) count++;
    }

    int[] numbers= new int[count];

    int index=0;
    try {
        for (String s:str){
            if (isNumeric(s)) numbers[index]=Integer.parseInt(s);
        }
        return numbers;

    }catch (Exception e){
        System.out.println("not a number");
    }
    return numbers;
}

private static boolean isNumeric(String text){
    if (text==null) return false;
    char[] chars=text.toCharArray();
    for (char ch:chars){
        if (!Character.isDigit(ch)) return false;
    }
    return true;
}

}

try this implementation which avoids implementing isNumeric yourself and returns a list instead of an array because the length of the numbers is not fixed

List<Integer> numbers = new ArrayList<>();
for (String s : str) {
    try {
         numbers.add(Integer.valueOf(s));
    } catch (NumberFormatException e) {
         System.out.println(s + " not a number");
    }
}

Try Catch in Java - Exception handling, Use the try block to contain statements that might raise or throw an exception. Place statements to handle exceptions in one or more catch� We were once asked in class what TRY/CATCH doesn’t handle besides object existence errors. It’s well documented in Books Online (BOL). If you’re like me, then tl;dr. Are we even calling it Books Online these days? I still say “bookmark lookup” instead of “key lookup”. I suppose I’ll be saying Books Online for quite some

Add an else to isNumeric:

if (isNumeric(s)) {
    numbers[index]=Integer.parseInt(s);
} else {
    System.out.println("not a number");
}

Change the error message inside the catch. It might still be called, like when the string is to big to be an Integer.

How to: Use the Try-Catch Block to Catch Exceptions, First, the code in try {} is executed. If there were no errors, then catch(err) is ignored: the execution reaches the end of try and goes on, skipping catch . If an error occurs, then the try execution is stopped, and control flows to the beginning of catch(err) . Try - Catch doesn't actually Catch (like I want it to) SQL Server > Transact-SQL. Transact-SQL

You can reduce your code as follows:

public static List<Integer> findNumbers(String text) {
    String[] str = text.split(" ");
    List<Integer> numbers = new ArrayList<Integer>();
    for (String s : str) {
        try {
            numbers.add(Integer.parseInt(s));
        } catch (NumberFormatException e) {
            System.out.println(s+" is not an integer");
        }
    }
    return numbers;
}

Error handling, "try..catch", try { } catch (ExceptionType name) { } catch (ExceptionType name) { } In this example, the catch parameter ex is final and therefore you cannot assign any� You are seeing this behavior because try/catch blocks only work on terminating errors (MSDN Powershell Error Type Reference) You can manipulate the way Powershell works by changing the $ErrorActionPreference Variable.

The catch Blocks (The Java™ Tutorials > Essential Classes , Some Exceptions are not getting caught by try..catch blocks unless you specify the attribute [HandleProcessCorruptedStateExceptions] on the� A catch -block contains statements that specify what to do if an exception is thrown in the try -block. If any statement within the try -block (or in a function called from within the try -block) throws an exception, control is immediately shifted to the catch -block. If no exception is thrown in the try -block, the catch -block is skipped.

Try/Catch doesn't catch exception, try { // Block of code to try } catch(Exception e) { // Block of code to handle errors } This will generate an error, because myNumbers[10] does not exist. That catch block should catch the exception, but make sure there's no re-throwing in there. Another small comment: I've been tricked quite a few times by VS, cause it breaks on exceptions like that while running in debug-mode. Try to simply press 'continue' or 'F5' and see if your application doesn't work anyway :)

Java Exceptions (TryCatch), In other words, you can "try" to execute a block of code, and "catch" any exceptions that are thrown. Catching all exceptions. The simplest way to catch exceptions� Errors that have a severity of 20 or higher that cause the Database Engine to close the connection will not be handled by the TRY…CATCH block. However, TRY…CATCH will handle errors with a severity

Comments
  • You're only calling parseInt if the string is numeric, and if it's numeric, parseInt presumably won't cause an error to be thrown.
  • try and catch is for error handling. I think you're going to want an if statement here. Your try catch executes with valid code and if it doesn't, for whatever reason you'd catch it with a 'general exception'