java.time

Question

我正在尝试这些问题：https://www.codeeval.com/browse/214/以下是我的代码和输出：的 CODE

public class TimeSort implements Comparable<TimeSort>{
   public int hour;
   public int minutes;
   public int seconds;

   public TimeSort(int hour, int minutes, int seconds) {
      this.hour = hour;
      this.minutes = minutes;
      this.seconds = seconds;
  }

  public TimeSort(String str){
    /*DateFormat formatter = new SimpleDateFormat("HH:mm:ss");
    final String x = str;
    try {
        Date time = sdf.parse(x);

        //Time time = new Time(new SimpleDateFormat("HH:mm:ss").parse(x).getTime());
        this.hour = time.getHours();
        this.minutes = time.getMinutes();
        this.seconds = time.getSeconds();
    } catch (ParseException e) {
        e.printStackTrace();
    }*/

    String[] parts = str.split(":");
    int hour = Integer.parseInt(parts[0]);
    int minutes = Integer.parseInt(parts[1]);
    int seconds = Integer.parseInt(parts[2]);

    this.hour = hour;
    this.minutes = minutes;
    this.seconds = seconds;
}

public int getHour() {
     return hour;
 } 

public void setHour(int hour) {
    this.hour = hour;
}

public int getMinutes() {
    return minutes;
}

public void setMinutes(int minutes) {
    this.minutes = minutes;
}

public int getSeconds() {
    return seconds;
}

public void setSeconds(int seconds) {
    this.seconds = seconds;
}

@Override
public String toString() {
    if(this.getHour() < 10){
        return "0"+this.getHour()+":"+this.getSeconds()+":"+this.getSeconds();
    }

    return this.getHour()+":"+this.getSeconds()+":"+this.getSeconds();
}

public static void main(String[] args){

    List<String> inputs = new ArrayList<>();
    inputs.add("02:26:31 14:44:45 09:53:27");
    inputs.add("05:33:44 21:25:41");
    inputs.add("02:26:31 14:44:45 09:53:27 02:26:31 01:44:45 19:53:27");

    for (String input : inputs){
        sortTimes(input);
    }

}

@Override
public int compareTo(TimeSort timeSort) {
    if(this.getHour() > timeSort.getHour()){
        return -1;
    }
    else if(this.getHour() < timeSort.getHour()){
        return 1;
    }
    else if(this.getHour() == timeSort.getHour()) {
        if(this.getMinutes() > timeSort.getMinutes()){
            return -1;
        }
        else if(this.getMinutes() < timeSort.getMinutes()){
            return 1;
        }
    }
    else if(this.getSeconds() > timeSort.getSeconds()){
        return 1;
    }

    return 0;
}

public static void sortTimes(String str){
    List<TimeSort> list = new ArrayList<>();
    String[] times = str.split(" ");

    for (String time : times){
        list.add(new TimeSort(time));
    }

    System.out.print("Before Sorting: ");
    for (TimeSort t : list){
        System.out.print(t + " ");
    }
    System.out.println();
    Collections.sort(list);
    System.out.print("After Sorting: ");
    for (TimeSort t : list){
        System.out.print(t + " ");
    }
    System.out.println();
    System.out.println("==============================================================");
 }
}

输出

Before Sorting: 02:31:31 14:45:45 09:27:27 
After Sorting: 14:45:45 09:27:27 02:31:31 
==============================================================
Before Sorting: 05:44:44 21:41:41 
After Sorting: 21:41:41 05:44:44 
==============================================================
Before Sorting: 02:31:31 14:45:45 09:27:27 02:31:31 01:45:45 19:27:27 
After Sorting: 19:27:27 14:45:45 09:27:27 02:31:31 02:31:31 01:45:45 
==============================================================

我看到的奇怪的事情是时间不能正确打印。例如02:26:31打印为02:31:31。即使我试图解析字符串时间（代码的注释部分），它也是一样的

感谢任何帮助。感谢

Answer 1

您的toString()方法存在错误：

@Override
public String toString() {
    if(this.getHour() < 10){
        return "0"+this.getHour()+":"+this.getSeconds()+":"+this.getSeconds();
    }

    return this.getHour()+":"+this.getSeconds()+":"+this.getSeconds();
}

请注意，第二个字段是getSeconds()而不是getMinutes()。

Answer 2

您的toString() - 方法无法打印会议记录！

Answer 3

其他答案在您的代码中发现了错误。

java.time

仅供参考，所有这些代码都是不必要的。 Java 8及更高版本内置了java.time框架。其中的类是LocalTime，用于表示没有日期且没有时区的仅限时间的值。此类已经知道如何compare并对其值进行排序以及如何parse / print其值。默认情况下，打印遵循标准ISO 8601格式。

List<LocalTime> times = new ArrayList<>();
times.add( LocalTime.parse( "02:26:31" );
times.add( LocalTime.parse( "14:44:45" );
times.add( LocalTime.parse( "09:53:27" );
Collections.sort( times );

转储到控制台。

System.out.println( times );

排序时间没有日期

3 个答案:

java.time