Below snippet return true if the collection is null or empty.
public static boolean isCollectionNullOrEmpty(Collection<?> collection) {
return collection == null || collection.isEmpty();
}
App.java
package com.sample.app;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
public class App {
public static boolean isCollectionNullOrEmpty(Collection<?> collection) {
return collection == null || collection.isEmpty();
}
public static void main(String args[]) {
System.out.println("Is list empty : " + isCollectionNullOrEmpty(null));
System.out.println("Is list empty : " + isCollectionNullOrEmpty(Collections.EMPTY_LIST));
System.out.println("Is list empty : " + isCollectionNullOrEmpty(Arrays.asList(2, 3, 5)));
}
}
Output
Is list empty : true
Is list empty : true
Is list empty : false
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