userinfo.java

j2se程序

import javax.swing.JOptionPane;

/*
 * Created on 2005-5-18
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

/**
 * @author ade
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class UserInfo {
	private int userID;
	private String userName;
	private long[] borrowTime = {0,0,0,0,0};
	private int[] borrowedBkID = {0,0,0,0,0};
	
	public int getUserID(){
		return userID;
	}
	
	public String getUserName(){
		return userName;
	}
	
	public void setUserID( int id ){
		userID = id; 
	}
	
	public boolean setUserName( String name ){
		char c;
		for(int i = 0 ; i <= name.length()-1 ; i++){
			c = name.charAt(i);
			if( !( (c >= 65 && c <= 90) || (c >= 97 && c<=122) ) ){
				JOptionPane.showMessageDialog( null,"illegal character:'" + c + "' in a user name" );
				return false;
			}
		}
		userName = name;
		return true;
	}
	
	public boolean borrowBook( int bkID ,long time){
		if( getAvailable() != 0 ) {
			for( int j = 0; j <= borrowedBkID.length-1; j++ ){
				if(borrowedBkID[j] == bkID){
					JOptionPane.showMessageDialog(null,"您已经借阅了这本书!");
					return false;
				}
			}
			for( int i = 0; i <= borrowedBkID.length-1; i++ ){
				if( borrowedBkID[i] == 0 ){
					borrowedBkID[i] = bkID;
					borrowTime[i] = time;
					return true;
				}
			}
		}
		return false;
	}
	
	public long getBorrowTime( int bookID ){
		for( int i = 0 ; i <= borrowedBkID.length - 1 ; i++ ){
			if( borrowedBkID[i] == bookID )
				return borrowTime[i];
		}
		return 0;
	}
	
	public boolean returnBook( int bkID ){
		int i;
		for( i = 0; i <= borrowedBkID.length - 1; i++ ){
			if( borrowedBkID[i] == bkID ){
				borrowedBkID[i] = 0;
				return true;
			}
		}
		return false;
	}
	

	/**
	 * @return
	 */
	public int[] getBorrowedBook() {
		// TODO Auto-generated method stub
		return borrowedBkID;
	}
	
	public int getAvailable(){
		int i,sum=0;
		for( i = 0; i <= borrowedBkID.length-1; i++ ){
			if( borrowedBkID[i] == 0 ) sum++;
		}
		return sum;
	}

}