dxdouble.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: DxDouble.java,v 1.5 2000/10/28 16:55:14 daniela Exp $

package org.ozoneDB.DxLib;

import java.io.*;


public class DxDouble extends DxObject implements Externalizable {
    
    final static long serialVersionUID = 1L;
    
    double value = 0;
    
    
    public DxDouble() {
    }
    
    
    public DxDouble( double v ) {
        value = v;
    }
    
    
    public DxDouble( DxDouble v ) {
        super();
        value = v.value;
    }
    
    
    public Object clone() {
        return new DxDouble( value );
    } 
    
    
    public boolean equals( Object obj ) {
        return value == ((DxDouble)obj).value;
    } 
    
    
    public boolean isLess( DxCompatible obj ) {
        return value < ((DxDouble)obj).value;
    } 
    
    
    public String toString() {
        return Double.toString( value );
    } 
    
    
    public double toDouble() {
        return value;
    } 
    
    
    public int hashCode() {
        //die fehlenden bits dann mit equals()
        return (int)value;
    } 
    
    
    public void writeExternal( ObjectOutput out ) throws IOException {
        out.writeDouble( value );
    } 
    
    
    public void readExternal( ObjectInput in ) throws IOException, ClassNotFoundException {
        value = in.readDouble();
    } 
}