Java AWT, Swing & Fundamentals

This is the correct answer because there are only three constructors for FlowLayout. These are:- FlowLayout() :- create a default flowLayoutFlowLayout(int Alignment) :- creates a flowlayout with specified alignment, where alignment can take value, FlowLayout.LEFT, FlowLayout.LEFT, FlowLayout.LEFTFlowLayout(int alignment, int hgap, int vgap) :- same as second constructor with specified horizontal and vertical gap between the components. 

This is correct answer because all of the given methods are valid in java event handling.

This option is correct because there is no method defined fillCircle() in Graphics class. 

This is the correct answer because there are two constructors of borderlayout are present in java. These are BorderLayout() :- creates a default borderlayout.BorderLayout(int hgap, int vgap) : creates a borderlayout with specified horizontal and vertical gaps between the components. 

This is the correct answer because color constructor creates a new color but it takes parameters in the range 0-255. But here the value passed is 284 (in first parameter). So, a runtime exception named “IllegalArgumentException” will be thrown by the JVM. 

This is the correct choice because the constructor of the Font class takes three parameters:
First:: first parameter is of String type which specifies the name of the Font.
Second: second parameter is of type int which specifies the style of the font like Font.BOLD.
Third: third parameter is of type int which specifies the size of the font.
ExampleFont f1 = new Font(“Serif”, Font.BOLD, 32); So this option is true.

This answer is correct because there are 8 primitive data types in java. These are ByteShortIntLongDoubleCharFloatBoolean.

This is the answer because JList doesn’t generate an ActionEvent. When we click an item in JList ListSelectionEvent is generated. 

This is the correct answer because all of the given layout managers are present in java awt.

This function is not defined in the Frame class. This function is defined in JFrame class in Swings. So this method cannot be invoked using the object of Frame class. But can be invoked using the Object of JFrame class.This method specifies the operation when the frame is closed. So the following line would be false. Frame f1 = new frame();f1.setDefaultCloseOperation(int); So, this is the correct answer.

As all of the given event types are valid in java. So, this option is correct.

If a class implements an interface, then it is necessary for that class to define body to all the methods defined in the interface it is implementing. But windowMoved() method is not present in windowListener interface. So, when a class will implement this interface this method need not be defined in the class. So, this option is correct.

As the reason is explained both methods in option 1 and 3 are not used by the web browser to control the applet. So, this option is correct.

IOException is not a subclass of RuntimeException class, this class is a Subclass of Exception class. This exception is thrown when invalid inputs/outputs are given. So, this is the correct answer as this is not a subclass of RuntimeException class.

There is no function defined in scanner class to take character input. So, there is no function named nextChar(). Hence, this is the correct answer.