用Java比较可比较数组
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我想比较一系列可比对象。最简单的方法如下所示（细节未显示）：
public class ArrayComparable implements Comparable<ArrayComparable>{
ArrayList<Comparable<?>> list = new ArrayList<Comparable<?>>();
@Override
public int compareTo(ArrayComparable ac) {
Iterator<Comparable<?>> itr = ac.list.iterator();
for(Comparable<?> l : list) {
Comparable<?> itrNext = itr.next();
if(itrNext.getClass() == l.getClass()) {
if(itrNext.compareTo(l)) {
//something
} else {
//other stuff
}
} else {
//some other thing
}
}
}
compareTo
The method compareTo(capture#6-of ?) in the type Comparable<capture#6-of ?> is not applicable for the arguments (Comparable<capture#7-of ?>)
(int,int)
(int, string)
(string, double, string)
没有找到相关结果
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5 个回复
谷起
都可以。实际上，如果需要，您可以将其放在一个地方：哩翔购
用作泛型类，以便您可以正确地对泛型进行参数化，而不是在所有地方都使用。哦，您也可以实施。public class ArrayComparable<T> implements Comparable<ArrayComparable<T>>, Iterable<T> { List<Comparable<T>> list = new ArrayList<Comparable<T>>(); @Override public int compareTo(ArrayComparable<T> ac) { // snip } @Override public Iterator<T> iterator() { return list.iterator(); } }阀傻
if(itrNext.getClass().cast(itrNext).compareTo(l.getClass().cast(l))) { //something } else { //other stuff }掏得透垦滩
public class GenericDemo<T>{ T g; public <T extends Comparable<T>> void printData(T a[]){ T max = a[0]; if(a[1].compareTo(max)>0){ max=a[1]; } if(a[2].compareTo(max)>0){ max=a[1]; } System.out.println(max); System.out.println(\"DataType: \" +a.getClass().getName()); } public static void main(String[] ar) { Integer a[]={1,2,3}; Byte b[]= {4,6,7}; Short c[]={6,8,9}; GenericDemo g = new GenericDemo(); g.printData(a); g.printData(b); g.printData(c); } }长拳
public final class ArrayComparable<T extends Comparable<T>> implements Comparable<ArrayComparable<T>> { private final ArrayList<T> list = new ArrayList<>(); @Override public int compareTo(final ArrayComparable<T> other) { final Iterator<T> it = other.list.iterator(); for (final T element : list) { final T otherElement = it.next(); final int comparison = element.compareTo(otherElement); if (comparison < 0) { // something } else if (comparison > 0) { // other stuff } else { // other stuff } } return 0; } }