Java Program ming
Exercise-01
Da y-04
Java-Programming Day-04 Taking Turn
1. Activity-1 [Add ing Buttons ] [Do not use Design tools for this activity ]
a. Create an applet
b. Import AWT package
c. Take a look at the Compon ent clas ses you learnt today, did you find the m?
d. Declare a button b [ just declare it ]
e. In constructo r crea te button object using new keyw ord
f. Assign labe l it “Click It”
g. Add it u sing the add() metho d
h. Compile your apple t and view the result
i. Add four more buttons , compile and exe cute your applet
j. Resize the appletviewer or brow ser to just few columns (use mous e), see what happens to
your arrangemen t, are the chang ing the ir position?
2. Activity-2
a. Add a lab el “Anonymou s”
b. Add action method to your apple t
c. Us e follow ing action method for your “Click It” butto n;
public bo olean action (Event event,Object action){
String s;
s=(String)action; //getting labe l of the butt on clicked
labe l1.setText(s );
return true;
}
3. Activity-3
a. Create or modify your ap plet and ad d four buttons with labels “BLUE”,”PINK”,”GREEN”,”WHITE”
b. Add action method to your apple t
c. W rite code in your action method such tha t when a button is pre ssed the ba ckground color of
your app let 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 Che ckBox button
i. Find this class in the awt package
ii. Try find out its various cons tructors by us ing JBuilder7 fea tures [cons tructors are
disp layed when you try to create an instan ce of a class]
iii. C reat e few che ck boxe s and add to an applet
iv. Explo re its metho ds
v. Add a command butto n [the normal button]
vi. Add action metho d to your ap plet for command button
vii. Write cod e in action metho d that clear a checkbox or uncheck a che ckbox
5. Activity-5
a. Try crea ting a simple calculator by follow ing the following steps
i. C reat e an applet and open JBuilde r de sign tool
ii. Add 10 command buttons with labels [1 ,2,3,4,5,6,7,8,9,0]
iii. Add 1 more comman d button s with labels [+]
iv. Add 1 more command butt on with labe l “Result”
v. Add 1 more command butto n with label “Clea r”
vi. Add a te xtField “inputscre en”
vii. In JBuilder de sign too ls click on applet canvas and set layout property = null o r
XYLay out and arrange the
viii. Arrange the component to look like a traditional calculator
ix. Ope n source pane and ad d action method with code for follow ings
1. Create integer varia bles num1 num2 and resu lt
2. Get lab el of the butto n clicked and sa ve corresponding value in variab les
3. if result butt on is pressed display the sum of num1 and num2 in te xt field
x. Compile your applet and view results
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