checktransfer.java

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package bank.dao;

import javax.swing.JOptionPane;

import bank.Trad;
import bank.Transfer;

public class CheckTransfer {
	CheckTrad c = new CheckTrad();
	public boolean checktf(String s1,String s2,String s4){
		if (!(s1.length() == 16 || s1.length() == 19)) {
			JOptionPane.showConfirmDialog(Transfer.f, "账号由16或19位数字组成", "错误提示!",
					JOptionPane.WARNING_MESSAGE);
			return false;
		}
		if (!c.checkchar(s1)) {
			JOptionPane.showConfirmDialog(Transfer.f, "账号只能声明为数字", "错误提示!",
					JOptionPane.WARNING_MESSAGE);
			return false;
		}
		if (s2.length() == 0) {
			JOptionPane.showConfirmDialog(Transfer.f, "用户名不能为空", "错误提示!",
					JOptionPane.WARNING_MESSAGE);
			return false;
		}
		if (checkDouble(s4)) {
			double d = Double.parseDouble(s4);
			if (d < 0) {
				JOptionPane.showConfirmDialog(Transfer.f, "金额不能为负值", "错误提示!",
						JOptionPane.WARNING_MESSAGE);
				return false;
			}
			if (d > CheckLogin.presentUser.getMonery()) {
				JOptionPane.showConfirmDialog(Transfer.f, "卡上金额不足", "错误提示!",
						JOptionPane.INFORMATION_MESSAGE);
				return false;
			}
		}
		else{
			JOptionPane.showConfirmDialog(Transfer.f, "金额格式不正确", "错误提示!",
					JOptionPane.WARNING_MESSAGE);
			return false;
		}
		return true;
	}
	public boolean checkDouble(String s){
		for(int i=0;i<s.length();i++){
			if(!((s.charAt(i)>='0'&&s.charAt(i)<= '9')||s.charAt(i)=='.'))
				return false;
		}
		return true;
	}
	public void alterMonery(String s){
		double alterMonery = CheckLogin.presentUser.monery-Double.parseDouble(s);
		CheckLogin.presentUser.setMonery(alterMonery);
	}
	
	
}