Everything in a Java program not explicitly set to something by the programmer, is initialized to a zero value. For references (anything that holds an object) that is null .

What is the default value of array elements in Java?

By default, when we create an array of something in Java all entries will have its default value. For primitive types like int , long , float the default value are zero ( 0 or 0.0 ). For reference types (anything that holds an object in it) will have null as the default value. For boolean variable it will be false .

How do you initialize a default array?

Using default values in initialization of array

For double or float , the default value is 0.0 , and the default value is null for string. Type[] arr = new Type[capacity]; For example, the following code creates a primitive integer array of size 5 . The array will be auto-initialized with a default value of 0 .