Switch to new open window in Selenium Java

How to get switch between Parent and Child Window.
Parent=The Current Window.
Child=That window which was opened after clicking on Link.

Example Link: https://automaticselenium.blogspot.com/p/example-switch.html

********************CODE*******************

package aveditor;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.chrome.ChromeDriver;

public class SwitchToChild {

public static void main(String []args)

{

WebDriver driver;

System.setProperty("webdriver.chrome.driver", ".\\ChromeDriverPath\\chromedriver.exe");

driver=new ChromeDriver();

driver.get("https://automaticselenium.blogspot.com/p/example-switch.html");

driver.manage().window().maximize(); //Maximize the Window after Opening the Links

// Getting the Parent Window 

String ParentWindow=driver.getWindowHandle();

driver.findElement(By.linkText("Click here for New Window")).click();

// Switching that window which is opened

for(String window:driver.getWindowHandles())

{

driver.switchTo().window(window);

}

}

}

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Switching first to the Child Window then again Back switch to the Parent Window

********************CODE*******************

package aveditor;

import org.openqa.selenium.By;

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.chrome.ChromeDriver;

public class NewTest {

public static void main(String []args) throws Exception

{

WebDriver driver;

System.setProperty("webdriver.chrome.driver", "C:\\Users\\oracle\\Music\\ChromeDriverPath\\chromedriver.exe");

driver=new ChromeDriver();

driver.get("https://automaticselenium.blogspot.com/p/example-switch.html");

driver.manage().window().maximize(); //Maximize the Window after Opening the Links

// Getting the Parent Window 

String ParentWindow=driver.getWindowHandle();

driver.findElement(By.linkText("Click here for New Window")).click();

// Switching that window which is opened

for(String window:driver.getWindowHandles())

{

driver.switchTo().window(window);

}

// Putting Thread to see the switching between parent and child window

Thread.sleep(10000);

// Switching back to the Parent Window

driver.switchTo().window(ParentWindow);

}

}