Java Based Case Study program Solved Question

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Savita created a GUI in NetBeans to calculate item prices and totals. When the calculate button is clicked, it displays the individual item prices and total based on which items are selected. When clear is clicked, it empties the text fields and checkboxes. When stop is clicked, it closes the application. Koshin created a GUI to calculate teacher salaries. It displays the total wages when calculate salary is clicked based on radio button selection for gender and skills. Clear empties the name and days worked fields, while stop closes the application. Mr. Kapoor created a GUI and needs code to display odd or even numbers in a text area based on the first number, clear the text fields and text area

2
 Savita is a programmer at Avon Shoe
Factory. She has created the following
GUI in NetBeans.

4
i. When calculate buttonis clickedthe amount should be
displayedinfront of eachitemand total item.
CODING:
private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) {
intsho, san , sli;
sho=Integer.parseInt(esh.getText());
san=Integer.parseInt(esa.getText());
sli=Integer.parseInt(esl.getText());
intshoe , sand, slip, tamn;
ash.setEditable(false);
asl.setEditable(false);
asa.setEditable(false);
tamnt.setEditable(false);
if(sh.isSelected()==true &&sa.isSelected()==false&&sl.isSelected()==false)
{
shoe=sho*1500;
sand=san*0;
slip=sli*0;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
else if(sh.isSelected()==false &&sa.isSelected()==true && sl.isSelected()==false)
{
shoe=sho*0;
sand=san*500;
slip=sli*0;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
else if(sh.isSelected()==false &&sa.isSelected()==false&&sl.isSelected()==true)
{
shoe=sho*0;
sand=san*0;
slip=sli*500;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);

5
}
else if(sh.isSelected()==true &&sa.isSelected()==true &&sl.isSelected()==false)
{
shoe=sho*1500;
sand=san*500;
slip=sli*0;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
else if(sh.isSelected()==false &&sa.isSelected()==true &&sl.isSelected()==true)
{
shoe=sho*0;
sand=san*500;
slip=sli*500;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
else if(sh.isSelected()==true &&sa.isSelected()==false&&sl.isSelected()==true)
{
shoe=sho*1500;
sand=san*0;
slip=sli*500;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
else if(sh.isSelected()==true &&sa.isSelected()==true &&sl.isSelected()==true)
{
shoe=sho*1500;
sand=san*500;
slip=sli*500;
tamn=shoe+sand+slip;
ash.setText(""+shoe);
asa.setText(""+sand);
asl.setText(""+slip);
tamnt.setText(""+tamn);
}
}

6
ii. When Clear buttonis clickedall text fieldandcheckboxes
shouldbe cleared.
Coding:
ash.setEditable(false);
asl.setEditable(false);
asa.setEditable(false);
tamnt.setEditable(false);
esh.setText("");
esl.setText("");
esa.setText("");
ash.setText("");
asl.setText("");
asa.setText("");
tamnt.setText("");
sh.setSelected(false);
sl.setSelected(false);
sa.setSelected(false);
iii. When Stopbuttonis clickedthe applicationshouldclose.
Coding:
System.exit(0);

7
 Koshin is a programmer at Computers
Ltd.To calculate salary to be paid to
teachers she has developed.
The following GUI in NetBeans :

8
I. What shouldbe done sothat only one of the radio buttons
(Male and Female) can be selectedat a time?
Ans. Both the radio button should be put in a button group.
II. Write code todo the Following:
a) Calculate and display the total wages in the
corresponding label whenthe Calculate Salary buttonis
pressed.
Coding:
private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) {
intsalary, nday, tsal;
sal.setEditable(false);
if(mal.isSelected())
{
salary=1000;
}
else
salary=2000;
if(skil.isSelected())
salary+=500;
nday=Integer.parseInt(wor.getText());
tsal=nday*salary;
sal.setText(""+tsal);
}
b) Clear the name and no. of days workedtext fields.
CODING:
private voidjButton2ActionPerformed(java.awt.event.ActionEventevt) {
nam.setText("");
wor.setText("");
}

9
c) Close the applications whenthe STOP buttonis pressed.
CODING:
private voidjButton3ActionPerformed(java.awt.event.ActionEventevt) {
System.exit(0);
}

10
 Mr Kapoor is a programmer ateducation
enterprises. Hecreated the following GUI in
NetBeans . Help him To write code for the
following:

11
a. To display series of oddor evennumbers (depending on first
number is evenor odd) in the jTextArea onthe click of
command button.
Coding:
private voidjButton3ActionPerformed(java.awt.event.ActionEventevt) {
intfn, ln ;
fn=Integer.parseInt(fno.getText());
ln=Integer.parseInt(lno.getText());
for(inti=fn;i<=ln;i=i+2)
{
series.append(""+i + "n");
}
}
b. To clear boththe text fields andtext area, on clicking [Reset]
button.
private voidjButton2ActionPerformed(java.awt.event.ActionEventevt) {
fno.setText("");
lno.setText("");
series.setText("");
}
c. To terminate the applicationonthe click of[stop]button.
private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) {
System.exit(0);
}

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Java Based Case Study program Solved Question

1. 1

2. 2  Savita is a programmer at Avon Shoe Factory. She has created the following GUI in NetBeans.

3. 3

4. 4 i. When calculate buttonis clickedthe amount should be displayedinfront of eachitemand total item. CODING: private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) { intsho, san , sli; sho=Integer.parseInt(esh.getText()); san=Integer.parseInt(esa.getText()); sli=Integer.parseInt(esl.getText()); intshoe , sand, slip, tamn; ash.setEditable(false); asl.setEditable(false); asa.setEditable(false); tamnt.setEditable(false); if(sh.isSelected()==true &&sa.isSelected()==false&&sl.isSelected()==false) { shoe=sho*1500; sand=san*0; slip=sli*0; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } else if(sh.isSelected()==false &&sa.isSelected()==true && sl.isSelected()==false) { shoe=sho*0; sand=san*500; slip=sli*0; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } else if(sh.isSelected()==false &&sa.isSelected()==false&&sl.isSelected()==true) { shoe=sho*0; sand=san*0; slip=sli*500; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn);

5. 5 } else if(sh.isSelected()==true &&sa.isSelected()==true &&sl.isSelected()==false) { shoe=sho*1500; sand=san*500; slip=sli*0; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } else if(sh.isSelected()==false &&sa.isSelected()==true &&sl.isSelected()==true) { shoe=sho*0; sand=san*500; slip=sli*500; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } else if(sh.isSelected()==true &&sa.isSelected()==false&&sl.isSelected()==true) { shoe=sho*1500; sand=san*0; slip=sli*500; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } else if(sh.isSelected()==true &&sa.isSelected()==true &&sl.isSelected()==true) { shoe=sho*1500; sand=san*500; slip=sli*500; tamn=shoe+sand+slip; ash.setText(""+shoe); asa.setText(""+sand); asl.setText(""+slip); tamnt.setText(""+tamn); } }

6. 6 ii. When Clear buttonis clickedall text fieldandcheckboxes shouldbe cleared. Coding: ash.setEditable(false); asl.setEditable(false); asa.setEditable(false); tamnt.setEditable(false); esh.setText(""); esl.setText(""); esa.setText(""); ash.setText(""); asl.setText(""); asa.setText(""); tamnt.setText(""); sh.setSelected(false); sl.setSelected(false); sa.setSelected(false); iii. When Stopbuttonis clickedthe applicationshouldclose. Coding: System.exit(0);

7. 7  Koshin is a programmer at Computers Ltd.To calculate salary to be paid to teachers she has developed. The following GUI in NetBeans :

8. 8 I. What shouldbe done sothat only one of the radio buttons (Male and Female) can be selectedat a time? Ans. Both the radio button should be put in a button group. II. Write code todo the Following: a) Calculate and display the total wages in the corresponding label whenthe Calculate Salary buttonis pressed. Coding: private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) { intsalary, nday, tsal; sal.setEditable(false); if(mal.isSelected()) { salary=1000; } else salary=2000; if(skil.isSelected()) salary+=500; nday=Integer.parseInt(wor.getText()); tsal=nday*salary; sal.setText(""+tsal); } b) Clear the name and no. of days workedtext fields. CODING: private voidjButton2ActionPerformed(java.awt.event.ActionEventevt) { nam.setText(""); wor.setText(""); }

9. 9 c) Close the applications whenthe STOP buttonis pressed. CODING: private voidjButton3ActionPerformed(java.awt.event.ActionEventevt) { System.exit(0); }

10. 10  Mr Kapoor is a programmer ateducation enterprises. Hecreated the following GUI in NetBeans . Help him To write code for the following:

11. 11 a. To display series of oddor evennumbers (depending on first number is evenor odd) in the jTextArea onthe click of command button. Coding: private voidjButton3ActionPerformed(java.awt.event.ActionEventevt) { intfn, ln ; fn=Integer.parseInt(fno.getText()); ln=Integer.parseInt(lno.getText()); for(inti=fn;i<=ln;i=i+2) { series.append(""+i + "n"); } } b. To clear boththe text fields andtext area, on clicking [Reset] button. private voidjButton2ActionPerformed(java.awt.event.ActionEventevt) { fno.setText(""); lno.setText(""); series.setText(""); } c. To terminate the applicationonthe click of[stop]button. private voidjButton1ActionPerformed(java.awt.event.ActionEventevt) { System.exit(0); }

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