A demo for SuppressWarnings: unchecked and fallthrough warnings : Standard Annotations « Language « Java Tutorial

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Uses the SuppressWarnings annotation type to prevent the compiler from issuing unchecked and fallthrough warnings

import java.io.File;
import java.io.Serializable;
import java.util.ArrayList;

@SuppressWarnings (value={"unchecked", "serial"})

public class SuppressWarningsTest implements Serializable {
    public void openFile () {
        ArrayList a = new ArrayList ();
        File file = new File ("X:/java/doc.txt");
    }
}