Java StringBuilder: Adding Strings with append(String str) Method | Java Tutorial Channel: Ram N Java1K views • 02/05/2016Related VideosJava StringBuffer append(String str) Method: Explained with Examples | Java TutorialUnderstanding Java StringBuilder's insert(int offset, String str) Method | Java TutorialJava StringBuilder: replace(int start,int end, String str) Method Explained | Java TutorialJava StringBuffer insert(int offset, String str) Method in Action | Java Tutorial