simpletest.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: SimpleTest.java,v 1.6 2000/10/28 16:55:15 daniela Exp $

package org.ozoneDB.DxLib.test;

import java.util.*;
import java.io.*;
import org.ozoneDB.DxLib.*;
import org.ozoneDB.core.*;


class SimpleTest {
    
    
    public static void main( String[] args ) throws Exception {
        DxDeque deque = new DxArrayDeque( 1024 );
        deque.peek();
        deque.pushBottom( "daniela" );
        deque.pushBottom( "knuffi" );
        
        System.out.println( deque.count() );
        System.out.println( deque.popBottom() );
        System.out.println( deque.popBottom() );
        
        deque.push( "daniela" );
        deque.push( "knuffi" );
        System.out.println( deque.pop() );
        deque.push( "mumpi" );
        
        System.out.println( deque.count() );
        System.out.println( deque.pop() );
        System.out.println( deque.pop() );
    
    
    //       System.out.println ("\nzeit: " + (System.currentTimeMillis() - start) + "msec");
    } 
    
    
    public void testMemory() {
        Runtime rt = Runtime.getRuntime();
        
        try {
            DxVector bag = new DxArrayBag();
            for (int i = 0; i < 100000; i++) {
                bag.add( new byte[100000] );
                System.out.println( "total:" + rt.totalMemory() + " free:" + rt.freeMemory() );
            } 
        } catch (OutOfMemoryError e) {
            System.gc();
        } 
        
        System.out.println( "total:" + rt.totalMemory() + " free:" + rt.freeMemory() );
    } 
    
    
    public static void testDiskHash( String[] args ) throws Exception {
        long start = System.currentTimeMillis();
        
        int count = Integer.valueOf( args[0] ).intValue();
        boolean re_use = Boolean.valueOf( args[1] ).booleanValue();
        System.out.println( count + ", " + re_use );
        
        DxDiskHashMap map = new DxDiskHashMap( "map/map", 100, 12, 8 );
        
        //       if (re_use)
        //           map.re_use();
        //       else {
        //           for (int i=0; i<count; i++) {
        //               map.addForKey ("daniela", new Integer(i));
        //               }
        //           System.out.println ("\naddForKey(): " + (System.currentTimeMillis() - start) + "msec");
        //           }
        
        for (;;) {
            start = System.currentTimeMillis();
            for (int i = 0; i < count; i++) {
                map.addForKey( String.valueOf( i ), new Integer( i ) );
            } 
            System.out.println( "\naddForKey(): " + (System.currentTimeMillis() - start) + "msec" );
            
            start = System.currentTimeMillis();
            for (int i = 0; i < count; i++) {
                String s = (String)map.elementForKey( new Integer( i ) );
                if (!s.equals( String.valueOf( i ) )) {
                    throw new Exception( "falscher inhalt" );
                } 
            } 
            System.out.println( "\nelementForKey(): " + (System.currentTimeMillis() - start) + "msec" );
            
            start = System.currentTimeMillis();
            for (int i = 0; i < count; i++) {
                String s = (String)map.removeForKey( new Integer( i ) );
                if (!s.equals( String.valueOf( i ) )) {
                    throw new Exception( "falscher inhalt" );
                } 
            } 
            System.out.println( "\nremoveForKey(): " + (System.currentTimeMillis() - start) + "msec" );
            
            map.printStatistics();
        } 
    
    //       map.close();
    //       System.out.println ("\nclose(): " + (System.currentTimeMillis() - start) + "msec");
    } 
    
}