The role of import in java

The role of the import statement in Java is to allow the import of classes or types that are not defined in the current source file. To avoid naming conflicts, use fully qualified names to specify unique identifiers for classes. Use the asterisk wildcard character (*) to import all classes and types in a package, but use it with caution as it can lead to cluttered code.

The role of import in Java

The import statement is used in the Java language to import classes, interfaces, and enumerations. Examples of key keywords such as these. Its function is to allow us to use classes or types in Java code that are not defined in the current source file.

Introducing undefined types

In Java code, if we want to use a class or other type that is not defined in the current source file, we need to use import statement. For example:

<code class="java">import java.util.List;</code>

This statement will import the List class so that we can use it in the current source file.

Avoid naming conflicts

Classes and types in Java can have the same name, which may lead to naming conflicts. Use the import statement to avoid this problem by specifying the fully qualified name of the class. For example:

<code class="java">import java.util.Arrays;
import java.lang.Arrays;</code>

This statement will import the java.util.Arrays and java.lang.Arrays classes without conflict even if they have the same name.

Wildcard import

The import statement also supports importing all classes in a package using the asterisk (*) wildcard character. For example:

<code class="java">import java.util.*;</code>

This statement will import all classes and types in the java.util package. It is important to note that using wildcard imports can lead to cluttered code and is not recommended in most cases.

Best Practices

When using the import statement, it is important to follow the following best practices:

• Import only what you need type.
• Avoid using wildcard imports.
• Use fully qualified names to avoid naming conflicts.
• Place the import statement at the top of the source file.

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