I am now trying to learn java tree in java oracle tutorial here at creating a tree part. I have difficulties to implement the code inside my netbean jframe. where should i put the code. currently i put the code inside my public class jframe as shown below but return error.
private void createNodes(DefaultMutableTreeNode top) { //illegal start of expression
Whoa, from the looks of your image, the method createNodes
is inside the constructor, Hence //illegal start of expression
. You'll want to take that out of the constructor and put it on the class level.
Side Note
In Netbeans, make use of Shift + Alt + F to properly indent your code. You may notice errors you wouldn't see otherwise, like maybe this one :)
Providing us with actual text code is much more effective than providing a screen shot of your code.