Answer:
lblMessage.setText("Hello World");
Explanation:
javax.swing.JLabel is used to display a textual element on a user interface. e.g., Suppose you have a panel containing the label "Name:" followed by a textbox to display the name , then the string "Name:" can be displayed on the interface by creating an instance of JLabel. In order to assign the specific text with the JLabel we use the method JLabel.setText(); This method take a string argument corresponding to the actual text to be displayed. In the question this string argument is "Hello World".
