keyword.java

用JAVA实现的miniSQL

public class Keyword {
    int type;
    String skey;
    int ikey;
    float fkey;
    public Keyword(String key) {
    	type = 3;
    	this.skey = key;
    }
    public Keyword(int key){
    	type = 1;
    	this.ikey = key;
    }
    public Keyword(float key){
    	type = 2;
    	this.fkey = key;
    }
    public int compareTo(Keyword key1){
    	if(type == 1)
    		return this.ikey-key1.ikey;
    	else if(type == 2)
    		return (int)(this.fkey-key1.fkey);
    	else
    		return skey.compareTo(key1.skey);	
    }
    public int length(){
    	if(type == 1)
    		return 4;
    	else if(type == 2)
    		return 4;
    	else
    		return skey.length()*2;
    }   
}