Java Stream Example

File Structure

IDE(Recommand)

Visual Studio Code

Format:

$ javac -d . [FileName.java]$ java [Package].[ClassName]

Run

Compile & Execute:

$ javac -d . HelloWorld.java$ java hello.HelloWorld

Code

Snippet

public static boolean containsName(ArrayList<Cat> list, String name){  return list.stream().filter(o -> o.getName().equals(name)).findFirst().isPresent();}

Source

Ref:

Java List.contains(Object with field value equal to x)

How can I solve "java.lang.NoClassDefFoundError"?