Java Core Classes and Threads

This stream class in java creates and maintains a buffer for an input stream.

This method in StringBuffer class is used to replace one set of characters with another set inside a StringBuffer object.

This method in StringBuffer class is used to set the length of the buffer within a StringBuffer object.

This method is used in StringBuffer class to concatenate the string representation of any other type of data to the end of the invoking StringBuffer object.

This is the correct choice. getLabel() method was earlier defined in the AbstractButton class, but now this method has been deprecated and is replaced by getText() method. This method is used to get the button's text.

This is the correct choice. There is no method named isRowHeightFixed() in AbstractLayoutCache class. The correct method name is isFixedRowHeight(). This method returns true if the height of each row is of a fixed size.

This is the correct choice. There is no method named getColCount() in TableModel Interface. The correct method name is getColumnCount() and it returns the number of columns in a model. 

This is the correct answer. There is no method named getDocumentContent() in the AbstractDocument class. The correct method name is getContent(). This method is used to retrieve the content for a document.

This is the correct choice. There is no method named isRightToLeft() present in the TextLayout class. The correct method name is isLeftToRight() and it returns true if this TextLayout has a left-to-right base direction or false if it has a right-to-left base direction.

This is the correct answer. There is no method named getMaximumWidth() in TableColumn class. The correct method name is getMaxWidth() and it returns the maximum width for the TableColumn.

This is the correct choice. getImage() method is not present in the ImageInputStream Interface. This method is present in the ImageIcon class and it returns the image associated with this particular icon.

This is the correct choice. getMaxAge() method is present in the HttpCookie class. This method returns the maximum age of the cookie, specified in seconds.

This is the correct choice. There is no method named getMaximumAge() in HttpCookie class. The correct method name is getMaxAge(). This method returns the maximum age of the cookie, specified in seconds.

This is the correct choice. There is no method named getURL() in ImageView class. The correct method name is getImageURL(). This method returns a URL for an image source or null if it could not be determined.

This is the correct choice. There is no method named getCols() present in the TextArea class. The correct method name is getColumns(), which is used to retrieve the number of columns in this text area.