progressdata.java

本程序在Unix_Linux环境下用Java语言编写的文件下载程序

package loader.data;

/**
 *
 * @author juddy
 */
public class ProgressData {
    public int MIN;
    public int MAX;
    
    private int currentLength;
    /**
     * the following methods including constructors is used to constructe the object.
     * must min <= cur_len <= max
     */
    public ProgressData( int min, int max, int cur_len ){
        MIN = min;
        MAX = max;
        
        this.currentLength = cur_len;
    }
    
    public ProgressData( int min, int max ){
        this( min, max, 0 );
    }
    
    public ProgressData(){
        MIN = 0;
        MAX = 0;
        this.currentLength = 0;
    }
    /**
     * when getting MIN, MAX , you just through ProgressData.MIN or ProgressData.MAX
     */
    public void setMin( int min ){
        MIN = min;
    }
    
    public void setMax( int max ){
        MAX = max;
    }
    /**
     * when the other thread be updating the currentLength's value, 
     * this thread must be blocked to wait.
     */
    synchronized public int getCurrentLength(){
        return this.currentLength;
    }
    /**
     * when the other thread be getting the currentLength's value,
     * this thread must be blocked to wait.
     */
    synchronized public void setCurrentLength( int inc_value ){
        if( this.currentLength < MAX ){
            this.currentLength += inc_value;
        }
    }
}