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"import java.util.ArrayList;" is a java code. It should be declared in "code theme". People may miss the "import package" code part since it is not discriminated from the other parts as a code part. If they miss the whole code will complain just because of this simple mistake. This way people wouldn't miss the code to import the package.
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SweeneyNew
2018-12-07 11:58:11 +03:00
committed by Manish Giri
parent c21a5bef62
commit d0758ab398
1 changed files with 4 additions and 1 deletions
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5
guide/english/java/arraylist/index.md
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@ -6,7 +6,10 @@ title: ArrayList
The *Collection framework* consists of all interfaces and classes that can hold a set of values (similar to [arrays](https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html)). **ArrayList** is a class that is in this hierarchy and known as a _**Collection object**_. It implements the *List* interface which in turn implements the *Collection* interface. This *Collection* interface can be found in the `java.util` package. You will need to import this package.
```java import java.util.ArrayList; //is more efficient than importing all of java.util```
```java
import java.util.ArrayList; // is more efficient than importing all of java.util
```
Always import the most specific package in order to save memory size and performance time.