7249a2c88d
* to core-java-lang: * https://www.baeldung.com/java-separate-double-into-integer-decimal-parts * https://www.baeldung.com/java-sneaky-throws * https://www.baeldung.com/java-inheritance-composition * to core-java-array: * https://www.baeldung.com/java-array-copy * https://www.baeldung.com/java-initialize-array * https://www.baeldung.com/java-array-contains-value * https://www.baeldung.com/java-invert-array * https://www.baeldung.com/java-array-sum-average * https://www.baeldung.com/java-jagged-arrays * https://www.baeldung.com/java-util-arrays * https://www.baeldung.com/java-common-array-operations (from core-java-collections)