enum与int、String之间的转换

转载至：http://www.cnblogs.com/cuizhf/archive/2011/08/22/2150046.html

import java.util.HashMap;
import java.util.Map;

/**
 *
 * @author admin
 */
public enum Blah {
    A("text1"),
    B("text2"),
    C("text3"),
    D("text4");
    
    private String text;
    
    Blah(String text) {
        this.text = text;
    }
    
    public String getText() {
        return this.text;
    }
    
    // Implementing a fromString method on an enum type
    private static final Map<String, Blah> stringToEnum = new HashMap<String, Blah>();
    static {
        // Initialize map from constant name to enum constant
        for(Blah blah : values()) {
            stringToEnum.put(blah.toString(), blah);
        }
    }
    
    // Returns Blah for string, or null if string is invalid
    public static Blah fromString(String symbol) {
        return stringToEnum.get(symbol);
    }

    @Override
    public String toString() {
        return text;
    }
}