Java零钱通项目OOP的实现

package com.basic.study.realization.smallchange; import java.util.Scanner; //功能类 public class Function { private Scanner scanner = new Scanner(System.in); private int row = 0;//数组行 private int col = 0;//数组列 dataManage dataManage = new dataManage(); public void smallChangeShow() { int i = 0, j = 0; if ((dataManage.getArrayChange()[i][j] == null)) {//判断数组第一行第一列是否为空 System.out.println("没有任何收入或者支出信息"); } else { System.out.println("================零钱通明细================"); while (!(dataManage.getArrayChange()[i][j] == null)) { System.out.println(dataManage.getArrayChange()[i][j] + "\t" + dataManage.getArrayChange()[i][j + 1] + "\t时间\t" + dataManage.getArrayChange()[i][j + 2] + "\t\t" + dataManage.getArrayChange()[i][j + 3]); i++; } } } public void revenue() { dataManage.getArrayChange()[row][col] = "收益入账";//第一列存入类型 System.out.println("请输入您的收益入账情况："); double balance = numJudgement(); dataManage.getArrayChange()[row][col + 1] = "+" + balance;////第二列存入余额变化 dataManage.setBalance(balance); dataManage.getArrayChange()[row][col + 2] = dataManage.getDate();//存入时间 dataManage.getArrayChange()[row][col + 3] = "余额\t" + dataManage.getBalance();//存入余额情况 System.out.println("收益入账\t" + dataManage.getArrayChange()[row][col + 1] + "\t时间\t" + dataManage.getArrayChange()[row][col + 2]); row++;//存完第一行，变化到下一行 scanner.nextLine();//释放换行符，否则出现异常 } public void consume() { while (true) { System.out.println("请输入你的消费类型：（10个字以内）"); String consume = scanner.nextLine(); if (consume.length() < 10) { dataManage.getArrayChange()[row][col] = consume; } else { System.out.println("输入错误"); continue; } break; } System.out.println("请输入您的消费金额："); double consumeNum = numJudgement();//判断数字 scanner.nextLine(); if (dataManage.getBalance() < consumeNum) { System.out.println("余额不足，消费失败"); dataManage.getArrayChange()[row][col] = null; return; } dataManage.getArrayChange()[row][col + 1] = "-" + consumeNum; dataManage.setBalance(-consumeNum); dataManage.getArrayChange()[row][col + 2] = dataManage.getDate(); dataManage.getArrayChange()[row][col + 3] = "余额\t" + dataManage.getBalance(); System.out.println(dataManage.getArrayChange()[row][col] + "\t" + dataManage.getArrayChange()[row][col + 1] + "\t时间\t" + dataManage.getArrayChange()[row][col + 2]); row++; } public int exit() { while (true) { System.out.println("你确定要退出吗 y or n"); String answer = scanner.next(); if (answer.equals("yes") || answer.equals("y")) { return 4; } else { System.out.println("输入错误，返回零钱通界面"); return -1; } } } public double numJudgement() {//用以判断输入是否有误 double revenueNum; while (true) { if (scanner.hasNextDouble()) { double revenue = scanner.nextDouble(); if (revenue > 0 && revenue < 100000) { revenueNum = revenue; break; } else { System.out.println("输入数字有误，应该 > 0，请重新输入！"); scanner.nextLine(); } } else { System.out.println("请输入数字！"); scanner.nextLine(); } } return revenueNum; } }