tablemanager.java

一个用JAVA语言实现的SQL编译器。能够迅速实现对SQL语言的解析。

import java.util.*;

public class TableManager {
	public ArrayList tableList = new ArrayList();
	
	public TableManager() {
	}

	public void setTableList(TableStructure ts) {
			tableList.add(ts);
	}
	public TableStructure getTable(String tableName){
		Iterator it = tableList.iterator();
		TableStructure ts;
		while(it.hasNext()){
			ts=(TableStructure)it.next();
			if(ts.getTableName().equals(tableName)) 
				return ts;
		}
		return null;
	}
	public boolean dropTable(String tableName){
		
		Iterator it = tableList.iterator();
		TableStructure ts;
		while(it.hasNext()){
			ts=(TableStructure)it.next();
			if(ts.getTableName().equals(tableName)) 
				{
				tableList.remove(ts);
				ts=null;
				System.gc();  //调用回收站，销毁对象
				return true;
				}
		}
		return false;
	}
}