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chris munley
2,204 PointsIm really not sure how to sort this blogpost
Im not sure if im on the right path to getting this right or not I have been stuck for a little while on this. I know the code isnt complete I just want to know if im sorting right at all or if there is something else I should be doing. Thanks!
package com.example;
import java.util.Date;
public class BlogPost implements Comparable {
private String mAuthor;
private String mTitle;
private String mBody;
private String mCategory;
private Date mCreationDate;
public BlogPost(String author, String title, String body, String category, Date creationDate) {
mAuthor = author;
mTitle = title;
mBody = body;
mCategory = category;
mCreationDate = creationDate;
}
public int compareTo(Object obj) {
BlogPost other = (BlogPost) obj;
if (equals(other)) {
return 0 ; } else {
return 1; }
}
public void sort(Date[] array) {
for(int i = 0; i < (array.length - 1); i++) {
if(Date[i] > Date [i+1]) {
Date temp = array[i];
Date temp2 = array[i+1];
}
}
public String[] getWords() {
return mBody.split("\\s+");
}
public String getAuthor() {
return mAuthor;
}
public String getTitle() {
return mTitle;
}
public String getBody() {
return mBody;
}
public String getCategory() {
return mCategory;
}
public Date getCreationDate() {
return mCreationDate;
}
}
2 Answers
Sergey Podgornyy
20,660 PointsTry this code:
public int compareTo(Object obj) {
// Task 2 of 3
// In this step, cast the Object passed to the compareTo method
// to a com.example.BlogPost. Check for equality first, if they
// are equal return 0. Leave the default return of 1 in place
// for this step.
BlogPost blogpost = (BlogPost) obj;
if (equals(blogpost)) {
return 0;
}
// Task 3 of 3
// Alright, now let's order the blog post's creation date
// chronologically, oldest first.
// NOTE: The app where this class is being used ensures that no
// two blog posts are posted at the same time, so you do not need
// to worry about any edge cases.
return mCreationDate.compareTo(blogpost.mCreationDate);
}
chris munley
2,204 Pointsthank you
Haley Bengtson
Front End Web Development Techdegree Student 14,334 PointsI was stuck on this problem as well. I got mine to work with this code, but I am having trouble understanding how this sorts the blog posts by their dates. I thought that this only compared the two, without sorting and returned (-1, 0, 1).
Araz kuberin
6,199 PointsHello, Look at this two methods should it be correct by changing some places???
@Override public int compareTo(Object obj){ Treet other = (Treet) obj; if (equals(other)){ return 0; } int dateCmp = mCreationDate.compareTo(other.mCreationDate);
if(dateCmp == 0){
return mDescription.compareTo(other.mDescription);
}
return dateCmp;
}
@Override public int compareTo(Object obj){ Treet other = (Treet) obj; if (equals(obj)){ return 0; } int dateCmp = mCreationDate.compareTo(obj.mCreationDate);
if(dateCmp == 0){
return mDescription.compareTo(obj.mDescription);
}
return dateCmp;
}
chris munley
2,204 Pointschris munley
2,204 PointsI am supposed to sort by creation date chronologically I think