Introduction to Java Programming and Data Structures - Chapter 7: Single-Dimensional Arrays

These flashcards cover the key concepts and operations related to single-dimensional arrays in Java programming, as introduced in Chapter 7.

What is an array in programming?

An array is a data structure that represents a collection of the same types of data.

How do you declare an array reference variable in Java?

You declare an array reference variable using the syntax: datatype[] arrayRefVar; (e.g., double[] myList;).

What is the default value of numeric primitive data types in an array?

The default value of numeric primitive data types in an array is 0.

What range of indices is used to access elements in a Java array?

The indices of a Java array are 0-based, ranging from 0 to arrayRefVar.length - 1.

How do you find the size of an array in Java?

You can find the size of an array using arrayRefVar.length.

What is the syntax for creating an array in Java?

The syntax for creating an array is arrayRefVar = new datatype[arraySize]; (e.g., myList = new double[10];).

How can you initialize an array in one step in Java?

You can initialize an array in one step using shorthand notation: datatype[] arrayRefVar = {value1, value2, …}; (e.g., double[] myList = {1.9, 2.9, 3.4, 3.5};).

What happens when you try to split the shorthand declaration and initialization of an array?

Splitting the shorthand declaration and initialization would cause a syntax error.

What does the foreach loop do in Java?

The foreach loop allows you to traverse the complete array sequentially without using an index variable.

How can you copy contents from one array to another?

You can copy contents from one array to another using a loop or the arraycopy method.

What is the main difference between passing primitive data types and arrays to methods?

Primitive data types are passed by value, while arrays are passed by reference, allowing changes to affect the original array.

What is the purpose of the Arrays.sort method in Java?

The Arrays.sort method is used to sort an array of various types (int, double, char, etc.) in Java.

How do you print the contents of an array in Java?

You print the contents of an array using a loop to iterate through its elements.

What is a variable-length argument list in Java?

A variable-length argument list allows you to pass a variable number of arguments of the same type to a method.

What is an anonymous array in Java?

An anonymous array is an array created without an explicit reference variable, used directly in method calls.

What is the purpose of the java.util.Arrays.toString() method?

The java.util.Arrays.toString() method returns a string representation of the contents of the specified array.