If the conversion attempt fails -- for instance, if you try to convert the Java String fred to an int -- the Integer parseInt method will throw a NumberFormatException, which you should handle in a try/catch block.f the String represented by the variable myString is a valid integer like â1â, â200â, and so on, it will be converted to a Java int. If it fails for any reason, the conversion can throw a NumberFormatException, so your code should be a little bit longer to account for this, as shown in the next example.
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- are identified by a unique registration number. To take. xylene, for example, this substance is covered by four dif-. ferent CAS Registry and EINECS numbers: Hydrocarbon solvents are just one, relatively small, group. of products that are the output of petroleum refineries.