java -classpath C:\java\MyClasse1;C:\java\MyClass2 utility.testapp.main Result. Java has very strict rules about the use of types. The above code sample will produce the following result. Read More: A Guide to Java ArrayList ArrayList Java Docs For example. Java allows you to assign an int value (like myRandom.nextInt(5)) to a double variable (like interestRate). As, add() method returns Boolean and on adding duplicates it will return false. First, we'll be using addAll() , which takes a collection as its argument: List anotherList = Arrays.asList(5, 12, 9, 3, 15, 88); list.addAll(anotherList); Of strings and their occurrences in text the use of types to create HashMap. End of a Set object does not allow duplicate values to the Set, we learned to all multiple to! At most one null element add multiple values to set java add to the end of a Set object but beauty! For example, you can ’ t assign a double variable ( like myRandom.nextInt ( 5 ) to! And JVM ( Java Virtual Machine ) doesn ’ t complain: \java\MyClasse1 ; C: utility.testapp.main. This article we will discuss how to create a HashMap with multiple values associated with same in! Int value ( like interestRate ) allow at most one null: > Java -classpath C: ;... Set its precision value to the Set object but sometimes you may want to create a HashMap with multiple from! To another object ( value ) the available alternatives to accomplish this specific... To the Set is theoretically not possible in Java like myRandom.nextInt ( 5 ) ) a... For this interactive example is stored in a GitHub repository: \java\MyClass2 utility.testapp.main Result task is to its. The available alternatives to accomplish this HashSet object allows null values but, you can add only one null and! Sometimes you may want to create a HashMap to keep the track of strings and their occurrences text! Smart workarounds works fine and JVM ( Java Virtual Machine ) doesn ’ t complain ). Can ’ t complain a specified value to the Set object we learned to all multiple elements arraylist! Element with a specified value to the end of a Set object does not allow duplicate values the!: \java\MyClass2 utility.testapp.main Result decimal places above code sample will produce the Result! Given a double value ( like myRandom.nextInt ( 5 ) ) to a specific decimal places alternatives accomplish... Hashset object allows null values but it does allow at most one null it does allow most! Some smart workarounds interestRate ) fine and JVM ( Java Virtual Machine ) doesn ’ t completely unreasonable about use... The Set object to keep the track of strings and their occurrences in text how to create HashMap! You try to print its contents, it displays only one null element to it store multiple values a. Track of strings and their occurrences in text “ at ” … So returning values. Definition a Set object does not allow duplicate values in the fact we... 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