Java Programming
Exercise-01
Day-04
Java-Programming Day-04 Taking Turn
1. Activity-1 [Adding Buttons] [Do not use Design tools for this activity ]
a. Create an applet
b. Import AWT package
c. Take a look at the Component classes you learnt today, did you find them?
d. Declare a button b [ just declare it ]
e. In constructor create button object using new keyword
f. Assign label it “Click It”
g. Add it using the add() method
h. Compile your applet and view the result
i. Add four more buttons, compile and execute your applet
j. Resize the appletviewer or browser to just few columns (use mouse), see what happens to
your arrangement, are the changing their position?
2. Activity-2
a. Add a label “Anonymous”
b. Add action method to your applet
c. Use following action method for your “Click It” button;
public boolean action(Event event,Object action){
String s;
s=(String)action; //getting label of the button clicked
label1.setText(s);
return true;
}
3. Activity-3
a. Create or modify your applet and add four buttons with labels “BLUE”,”PINK”,”GREEN”,”WHITE”
b. Add action method to your applet
c. Write code in your action method such that when a button is pressed the background color of
your applet changes according to the label of the button
4. Component Adventure [Try using a component which you didn’t learn in the class]
a. The CheckBox button
i. Find this class in the awt package
ii. Try find out its various constructors by using JBuilder7 features [constructors are
displayed when you try to create an instance of a class]
iii. Create few check boxes and add to an applet
iv. Explore its methods
v. Add a command button [the normal button]
vi. Add action method to your applet for command button
vii. Write code in action method that clear a checkbox or uncheck a checkbox
5. Activity-5
a. Try creating a simple calculator by following the following steps
i. Create an applet and open JBuilder design tool
ii. Add 10 command buttons with labels [1 ,2,3,4,5,6,7,8,9,0]
iii. Add 1 more command buttons with labels [+]
iv. Add 1 more command button with label “Result”
v. Add 1 more command button with label “Clear”
vi. Add a textField “inputscreen”
vii. In JBuilder design tools click on applet canvas and set layout property = null or
XYLayout and arrange the
viii. Arrange the component to look like a traditional calculator
ix. Open source pane and add action method with code for followings
1. Create integer variables num1 num2 and result
2. Get label of the button clicked and save corresponding value in variables
3. if result button is pressed display the sum of num1 and num2 in text field
x. Compile your applet and view results
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