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initialization

How-to articles, tricks, and solutions about INITIALIZATION

How can I initialise a static Map?

To initialize a static Map in Java, you can use the Map interface's of method, which was added in Java 9. The of method creates an immutable Map with a fixed set of key-value pairs.

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How to declare an ArrayList with values?

To declare an ArrayList with values in Java, you can use the Arrays.asList method and pass it an array or a list of values.

java arraylist initialization declare

How to directly initialize a HashMap in Java?

To directly initialize a HashMap in Java, you can use the put() method to add elements to the map.

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How to Initialization of an ArrayList in one line in Java

You can initialize an ArrayList in one line in Java using the following syntax:

java collections arraylist initialization

How to initialize an array in Java?

There are several ways to initialize an array in Java. Here are some examples: Using the new operator:

java arrays initialization

How to initialize an array of objects in Java

Here is an example of how you can initialize an array of objects in Java:

java object arrays initialization

How to initialize HashSet values by construction?

To initialize the values of a HashSet when constructing the set, you can use one of the HashSet constructors that takes a Collection as an argument.

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Initializing multiple variables to the same value in Java

In Java, you can initialize multiple variables to the same value in a single statement by separating the variables with a comma.

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Java: how to initialize String[]?

There are several ways to initialize a String array in Java. Here are a few examples:

java string initialization

Variable might not have been initialized error

If you are getting the "variable might not have been initialized" error in Java, it means that you are trying to use a local variable that has not been assigned a value.

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