我有一个Java列表,向它添加对象后需要对其进行排序。该对象具有三个元素。一个字符串和两个整数。该课程如下:
public class ValueWords implements Comparable<ValueWords>{
//.............................................
public static final Comparator<ValueWords> valComparator = new Comparator<ValueWords>()
{@Override
public int compare(ValueWords v1, ValueWords v2) {
return v1.valWord - v2.valWord; }
}
};
//....................................................................
private String strWord;
private int valWord;
private int phraseWord;
public int getPhraseWord() {
return phraseWord;}
public void setPhraseWord(int phraseWord) {
this.phraseWord = phraseWord;}
public String getStrWord() {
return strWord;}
public void setStrWord(String strWord) {
this.strWord = strWord;}
public int getValWord() {
return valWord;}
public void setValWord(int valWord) {
this.valWord = valWord;}
public ValueWords() {}
@Override
public int compareTo(ValueWords arg0) {
// TODO Auto-generated method stub
return 0;}
//..............................................
}
我这样称呼它
Collections.sort(valWordList,ValueWords.valComparator);
它给了我排序列表如下:
---------------------------------------------
strWord valWord phraseWord
abcd 0 1
abcde 0 0
mns 1 2
efgh 1 1
xyz 2 2
zxx 2 0
--------------------------------------------
我想要像这样的嵌套排序:
---------------------------------------------
strWord valWord phraseWord
abcde 0 0
abcd 0 0
efgh 1 1
mns 1 2
zxx 2 0
xyz 2 2
--------------------------------------------
我遵循了一些徒劳的尝试,但是对Java还是陌生的。他们没有工作。他们是安静的原始人,可以放在这里。
尝试更改比较器以检查两个值:
public static final Comparator<ValueWords> valComparator = new Comparator<ValueWords>() {
@Override
public int compare(ValueWords v1, ValueWords v2) {
if(v1.valWord == v2.valWord)
return v1.phraseWord - v2.phraseWord;
else
return v1.valWord - v2.valWord;
}
};
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