bankui.java

实现文件的问题 通过创建队列文件和用户存储记录来实现简单的银行功能

package com.deitel.jhtp3.ch17;//创建一个包
import java.awt.*;
import javax.swing.*;

public class BankUI extends JPanel {
	protected final static String names[] = {"Account number",
    "Frist name", "Last name", "Balance",
    "Transaction Amount"};//定义一个静态的final字符串数组
    protected JLabel labels[];//声明一个JLable对象的引用
    protected JTextField fields[];//声明一个JTextField对象的引用
    protected JButton doTask, doTask2;//声明两个JButton的引用
    protected JPanel innerPanelCenter, innerPanelSouth;//申明两个JPanel面板
    protected int size = 4;
    public static final int ACCOUNT = 0, FIRST = 1,
    LAST = 2, BALANCE = 3, TRANSCTION = 4;//定义几个静态的final变量
    public BankUI() {//构造函数
    	this (4);
    }
    public BankUI(int mySize) {//带参数的构造方法
    	size = mySize;
    	labels = new JLabel[size];//把声明一个JLable对象的引用
    	fields = new JTextField[size];//同上
    	
    	for(int i = 0; i < labels.length; i++) {
    		labels[i] = new JLabel(names[i]);//给引用赋值
    	}
    	for(int i = 0; i <  fields.length; i++) {
    		fields[i] = new JTextField();//给引用赋值
    	}
    	innerPanelCenter = new JPanel();//给申明的引用赋值
    	innerPanelCenter.setLayout(new GridLayout(size, 2));//设置布局管理器
    	
    	for(int i = 0; i< size; i++) {
    		innerPanelCenter.add(labels[i]);
    		innerPanelCenter.add(fields[i]);
      	}
      	doTask = new JButton();
      	doTask2 = new JButton();
      	innerPanelSouth = new JPanel();
      	innerPanelSouth.add(doTask2);
      	innerPanelSouth.add(doTask);
      	
      	setLayout(new BorderLayout());
      	add(innerPanelCenter, BorderLayout.CENTER);
      	add(innerPanelSouth, BorderLayout.SOUTH);
      	validate();
    }
    
    public JButton getDoTask() {
    	return doTask;
    }
    
    public JButton getDoTask2() {
    	return doTask2;
    }
    
    public JTextField[] getFields() {
    	return fields;
    }
    
    public void clearField() {
    	for(int i = 0; i < size; i++) {
    		fields[i].setText("");
    	}
    }
    
    public void setFieldValues(String[] s) 
                throws IllegalArgumentException {
        if(s.length != size) {
        	throw new IllegalArgumentException ("There must be"
        	+ size + "String in the array");
        	
        }
        for(int i = 0; i < size; i++) {
        	fields[i].setText(s[i]);
        }
    }
    
    public String[] getFieldValues() {
    	String values[] = new String[size];
    	
    	for(int i = 0; i < size; i++) {
    		values[i] = fields[i].getText();
    	}
    	return values;
    }
}