保存/加载数据？ [英] Saving/loading data?
本文介绍了保存/加载数据？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
（请求Snippits）
import java.util.Scanner;
import static java.lang.System.out;
public class Clock {
public static void main（String args []）throws InterruptedException {
扫描仪键盘=新的扫描仪（System.in）;
out.print（设置周和日）;
String specday = null;
String days = null;
String season = null;
String morning = null;
String month = null;
int inputweek = keyboard.nextInt（）;
int inputday = keyboard.nextInt（）;
int week = inputweek;
int day = inputday;
int hours = 1;
int minutes = 0;
int seconds = 0; （;秒< = 60;秒++）{
}
{
Thread.sleep（1）;
if（seconds == 60）minutes ++; {
if（minutes == 60）hours ++; {
if（hours == 24）day ++; {
if（day == 7&& hours == 23& amp;&分钟== 59&&秒== 59）week ++; {
if（week> 0&& week< 9）season =summer;
if（week> 44&& week< 49）season =summer;
if（week> 8&& week< 21）season =autumn;
if（week> 20&& week< 33）season =winter;
if（week> 32&& week< 45）season =spring;
if（week> 0&& week< 5）month =january;
if（week> 4&& week< 9）month =february;
if（week> 8&& week< 13）month =march;
if（week> 12&& week< 17）month =april;
if（week> 16&& week< 21）month =may;
if（week> 20&& week< 25）month =june;
if（week> 24&& week< 29）month =7月;
if（week> 28&& week< 33）month =august;
if（week> 32&& week< 37）month =9月
如果（周> 36&& week< 41）month =10月;
if（week> 40&& week< 45）month =十一月;
if（week> 44&& week< 49）month =12月;
if（week == 47&& day == 2）specday =christmas eve;
if（week == 47&& day == 3）specday =christmas;
if（week == 47&& day == 4）specday =boxing day;
if（hours< 12）morning =am;
if（hours> 11）morning =pm;
if（day == 1）days =monday;
if（day == 2）days =tuesday;
if（day == 3）days =wednesday;
if（day == 4）days =thursday;
if（day == 5）days =friday;
if（day == 6）days =saturday;
if（day == 7）days =sunday;
}
System.out.println（小时+：+分钟+：+秒+早+天+月+季+ specday）; {
if（seconds == 60）seconds = 0;
if（minutes == 60）minutes = 0;
if（hours == 24）hours = 0;
if（day> 7）day = 1;
if（week == 49）week = 1;
if（specday == null）; specday =;
}
}
}
}
}
}
}
解决方案
属性 使用基本键/值 String 对来存储值
它还具有方便的存储和加载方法
FileReader reader = null;
属性属性= new Properties（）;
try {
reader = new FileReader（clock.properties）;
properties.load（reader）;
} catch（IOException exp）{
exp.printStackTrace（）;
}
String lastTime = reader.getProperty（Clock.lastTime）;
//如果需要，使用像SimpleDateFormat这样的东西来解析String返回一个Date ...
或
String strHour = reader.getProperty（Clock.lastHour，0）;
String strMin = reader.getProperty（Clock.lastMinute，0）;
String strSec = reader.getProperty（Clock.lastSecond，0）;
//使用Integer.toString来解析结果，不要忘记检查nulls;）
您还可以使用 首选项 API ，类似于属性 API，但支持自动保存和支持原始数据类型
I'm still making my clock. I want to save/load my data from when I use the clock so when I close at a specific time(like January 23rd), when I re-open eclipse I can do something so it brings me back to said time. Any ideas? (Snippits requested)
import java.util.Scanner;
import static java.lang.System.out;
public class Clock {
public static void main(String args[]) throws InterruptedException {
Scanner keyboard = new Scanner(System.in);
out.print("Set the week and day.");
String specday = null;
String days = null;
String season = null;
String morning = null;
String month = null;
int inputweek = keyboard.nextInt();
int inputday = keyboard.nextInt();
int week = inputweek;
int day = inputday;
int hours = 1;
int minutes = 0;
int seconds = 0; {
}
for (;seconds <= 60; seconds++) {
Thread.sleep(1);
if (seconds == 60) minutes++; {
if (minutes == 60) hours++; {
if (hours == 24) day++; {
if (day == 7 && hours == 23 && minutes == 59 && seconds == 59)week++; {
if (week > 0 && week < 9) season = " summer";
if (week > 44 && week < 49) season = " summer";
if (week > 8 && week < 21) season = " autumn";
if (week > 20 && week < 33) season = " winter";
if (week > 32 && week < 45) season = " spring";
if (week > 0 && week < 5) month = " january";
if (week > 4 && week < 9) month = " february";
if (week > 8 && week < 13)month = " march";
if (week > 12 && week < 17) month = " april";
if (week > 16 && week < 21) month = " may";
if (week > 20 && week < 25) month = " june";
if (week > 24 && week < 29) month = " july";
if (week > 28 && week < 33) month = " august";
if (week > 32 && week < 37) month = " september";
if (week > 36 && week < 41) month = " october";
if (week > 40 && week < 45) month = " november";
if (week > 44 && week < 49) month = " december";
if (week == 47 && day == 2) specday = " christmas eve";
if (week == 47 && day == 3) specday = " christmas";
if (week == 47 && day == 4) specday = " boxing day";
if (hours < 12) morning = " am";
if (hours > 11) morning = " pm";
if (day == 1) days = " monday";
if (day == 2) days = " tuesday";
if (day == 3) days = " wednesday";
if (day == 4) days = " thursday";
if (day == 5) days = " friday";
if (day == 6) days = " saturday";
if (day == 7) days = " sunday";
}
System.out.println(hours + ":" + minutes + ":" + seconds + morning + days + month + season + specday); {
if (seconds == 60) seconds = 0;
if (minutes == 60) minutes = 0;
if (hours == 24) hours = 0;
if (day > 7) day = 1;
if (week == 49) week = 1;
if (specday == null); specday = " ";
}
}
}
}
}
}
}
解决方案
Properties uses a basic key/value String pair for storing a value against a specific key.
It also has convenient store and load methods
FileReader reader = null;
Properties properties = new Properties();
try {
reader = new FileReader("clock.properties");
properties.load(reader);
} catch (IOException exp) {
exp.printStackTrace();
}
String lastTime = reader.getProperty("Clock.lastTime");
// Use something like SimpleDateFormat to parse the String back to a Date if required...
or
String strHour = reader.getProperty("Clock.lastHour", "0");
String strMin = reader.getProperty("Clock.lastMinute", "0");
String strSec = reader.getProperty("Clock.lastSecond", "0");
// Use Integer.toString to parse the results, don't forget to check for nulls ;)
You could also use the Preferences API which is similar to the Properties API but supports automatic saving and support for primitive data types
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