Java StringToLongConverter

This post shows you how to convert String to Long in Java. Let's write a generic code in this post.

Create Generic Converter interface

/**
 * Converts objects of S type to T type.
 */
public interface Converter<S, T> {

    /**
     * Converts the source object from S type to T type.
     *
     * @param source the object to convert
     *
     * @return the converted object
     */
    T convert(S source);

}

Converts String to Integer - StringToLongConverter.java

Let's implement above Converter interface to convert String to Long in Java

/**
 * Converts String to Long.
 */
public class StringToLongConverter implements Converter<String, Long> {

    @Override
    public Long convert(String source) {
        return Long.valueOf(source);
    }
}

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