Java Collections.checkedList() method

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Collections.checkedList() method will returns a dynamically type safe view of the specified list. Example   … Read more

Java Collections.checkedCollection() method

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Collections.checkedCollection() method will returns a dynamically type safe view of the specified collection. Syntax: public … Read more

How to search user defined object from a List by using binary search using comparator?

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Collections.binarySearch() method will searches the specified list for the specified object using the binary search … Read more

Java Collections.asLifoQueue() method

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Collections.asLifoQueue() method will returns a view of a Deque as a Last-in-first-out (Lifo) Queue. Syntax: … Read more

How to add all elements to the given collection object?

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Collections.addAll() method adds all of the specified elements to the specified collection. Syntax: public boolean … Read more

Java collections class

The java.util.Collections class consists exclusively of static methods that operate on or return collections. It contains polymorphic algorithms that operate on collections, “wrappers”, which return a new collection backed by a specified collection, and a few other odds and ends. Java Collections class fields static List EMPTY_LIST: This is the empty list (immutable). static Map … Read more

how to create random alphanumeric in java?

The java.util.Random class is used to generate random numbers. Java Random class objects are thread safe. It provides several methods to generate random numbers of type integer, double, long, float etc. Note: Random class objects are not suitable for security sensitive applications so it is better to use java.security.SecureRandom in these cases. Example package com.w3schools; … Read more

how to create random string in java?

The java.util.Random class is used to generate random numbers. Java Random class objects are thread safe. It provides several methods to generate random numbers of type integer, double, long, float etc. Note: Random class objects are not suitable for security sensitive applications so it is better to use java.security.SecureRandom in these cases. Example package com.w3schools; … Read more

How to generate same random number sequence every time?

The java.util.Random class is used to generate random numbers. Java Random class objects are thread safe. It provides several methods to generate random numbers of type integer, double, long, float etc. Note: Random class objects are not suitable for security sensitive applications so it is better to use java.security.SecureRandom in these cases. We have to … Read more

How to generate random numbers in a given range in java?

The java.util.Random class is used to generate random numbers. Java Random class objects are thread safe. It provides several methods to generate random numbers of type integer, double, long, float etc. Note: Random class objects are not suitable for security sensitive applications so it is better to use java.security.SecureRandom in these cases. We can use … Read more