enumでコードの集まりを作ってみる ref: http://qiita.com/t-okushima/items/fb76b4ea28423b8c69ff

file0.java

public static final int SAFARI = 10;
public static final int CHROME = 20;
public static final int FIREFOX = 30;
public static final int OTHER = 99;

file1.java

public class Browser {
    public static final int SAFARI = 10;
    public static final int CHROME = 20;
    public static final int FIREFOX = 30;
    public static final int OTHER = 99;
}

file2.java

public enum BrowserKinds {
    Safari(10), Chrome(20), FireFox(30), Other(99);

    private final int code;

    private BrowserKinds(int _code) {
        this.code = _code;
    }

    public int getCode() {
        return this.code;
    }

    public static BrowserKinds valueOf(final int _code) {
        for (BrowserKinds kind : BrowserKinds.values()) {
            if (kind.code == _code) {
                return kind;
            }
        }

        return BrowserKinds.Other;
    }
}