informatics practices practical file

INFORMATICSPRACTICES

PRACTICAL

SUBMITTEDBY :
CSAISATHVICK
ROLL NO :

46

JAVA PROGRAMMING
Q1.Design a java program to print the table of the entered number?
Ans.
Preview-

Source Code-

Code for Table
private void jButton1ActionPerformed(java.awt.event.ActionEventevt) {
// TODO add your handling code here:
int x= Integer.parseInt(AT.getText());
inty,z=0;
for(y=1;y<=10;++y) {
z=y*x;
RT.append(z+"n");

}}

Code for Clear
private void clearActionPerformed(java.awt.event.ActionEventevt) {
AT.setText(" ");
RT.setText(" "); }

Q2.Design a java program to print the Fibonacci series of the entered number?
Ans.
Preview-

Source Code-

Code for Fibonacci
private void jButton2ActionPerformed(java.awt.event.ActionEventevt) {
int s1=0,s2=1,sum,n;
n=Integer.parseInt(AT.getText());
if(n==0)
RT.append(0+"n");

else
if(n==1)
RT.append(0+"n"+1+"n");
else {
RT.append(0+"n"+1+"n");
RT.append("");
for(inti=2; i<=n; i++) {
sum=s1+s2;
RT.append(sum+"n");
RT.append(" ");
s1=s2;
s2=sum;

} } }

Code for Clear
private void clearActionPerformed (java.awt.event.ActionEventevt) {
AT.setText("");
RT.setText("");
}

Q3.Design a java program to display the scored goal details and match result?
Ans.
Preview-

Source Code-

Code for Scored By A
private void GOAActionPerformed(java.awt.event.ActionEventevt) {
intga= Integer.parseInt(tAGoals.getText());
ga=ga+1;
tAGoals.setText(""+ga); }

Code for Scored By B
private void GOBActionPerformed(java.awt.event.ActionEventevt) {
intgb= Integer.parseInt(tBGoals.getText());
gb=gb+1;
tBGoals.setText(""+gb); }

Code for Declare Match
private void DCActionPerformed(java.awt.event.ActionEventevt) {
intga=Integer.parseInt(tAGoals.getText());
intgb=Integer.parseInt(tBGoals.getText());
String res=(ga>gb?"Team A wins":(ga<gb)?"Team B wins":"Draw");
result.setText(res);

}

Code for Clear
private void CLEARActionPerformed(java.awt.event.ActionEventevt) {
result.setText(" ");
tBGoals.setText("0");
tAGoals.setText("0");

}

Q4. Design a java program to add the Digits in input area?
Ans.
Preview-

Code of main methodintaddDigits(int n){int s=0;
int dig;
while(n>0){
dig=n%10;
s=s+dig;
n=n/10;
}return s;
}

Code for Compt……….. Buttonintnum=Integer.parseInt(input.getText());
int sum=addDigits(num);
out.setText("Sum of its digits is "+sum);

Q5. Design a java program to change background colour of different input
controls ?
Ans.
Preview-

Code for the jList (Event –ListSelection-valueChanged)private void ColValueChanged(javax.swing.event.ListSelectionEventevt) {
inti;
Color x=Color.WHITE;
i=Col.getSelectedIndex();
switch(i){
case 0: x=Color.RED;
break;
case 1: x=Color.BLUE;
break;

case 2: x=Color.GREEN;
break;
case 3: x=Color.MAGENTA;
break;
case 4: x=Color.CYAN;
break;
case 5: x=Color.YELLOW;
break;
case 6: x=Color.GRAY;
break;
}
if(LBL1.isSelected())
Lb.setBackground(x);
else
Lb.setBackground(Color.WHITE);
Btn.setBackground(x);
else
Btn.setBackground(Color.WHITE);
TF.setBackground(x);
else
TF.setBackground(Color.WHITE);

Q6. Design a java program to select the character from the list as given in
textfield?
Ans.
Preview-

Code of Select in List Buttonprivate void oKActionPerformed(java.awt.event.ActionEventevt) {
List.setSelectedValue(ENTER.getText(), true);

Q7.Design a java program to print the numbers in between the given input?
Ans.

Code of Count Buttonint a=Integer.parseInt(IN1.getText());
int b=Integer.parseInt(IN2.getText());
if(a>b){
for(;b<=a;b++)
{OUT.append(b+" ");}
}
else{
for(;a<=b;a++)
{ OUT.append(a+" ");}
}

Q8. Design a java program to check a string is palindrome or not?
Ans.

Code of Perform Palindrome Test ButtonString str=In.getText();
showPalindrome(str);

Main method Codepublic void showPalindrome(String s){
StringBuffer out=new StringBuffer(s);
if(isPalindrome(s))
s=s+": is a palindrome!";
else if(isPalindrome2(s))
s=s+ ": is a palindrome if you ignore case";
else

s=s+": is not a palinidrome! ";
Out.setText(s);
}
publicbooleanisPalindrome(String s)
{StringBuffer reversed=(new StringBuffer(s)).reverse();
returns.equalsIgnoreCase(reversed.toString());
}
publicboolean isPalindrome2(String s)
{StringBuffer reversed=(new StringBuffer(s)).reverse();
returns.equalsIgnoreCase(reversed.toString());
}

Q9. Design a java program to reverse a string?
Ans.

Code of Reverse ButtonString a=IN.getText();
String b="";
for(inti=a.length()-1;i>=0;i--){
b=b+a.charAt(i);
}OUT.setText(b);

Q10. Design a java program to find the occurrence of a character?
Ans.

Code of Count ButtonString a=In1.getText();
char b=In2.getText().charAt(0);
int c=0;
for(int d=0;d<a.length();d++){

if(a.charAt(d)==b)
c++;
} Out.setText (""+c);

Q11. Design a java program to find the position of a vowel in a string?
Ans.

Code of OK Button// TODO add your handling code here:
String a=IN.getText();
for(int d=0;d<=a.length();d++){
char c=a.charAt(d);
switch(c){
case 'a':
case 'A':
case 'e':
case 'E':
case 'i':
case 'I':

case 'o':
case 'O':
case 'u':
case 'U':
d=d+1;
OUT.append(" "+d+"n");
break;
default: } }

Q12. Design a java program to display a menu of Ice-cream parlour ?
Ans.

Code of Calculate Buttonif(St.isSelected()==true)
{ STP.setText("35");}

else
{STP.setText("0");
STQ.setText("0");}
if(Ch.isSelected()==true)
{CHP.setText("50");}
else
{CHP.setText("0");
CHQ.setText("0");}
if(Va.isSelected()==true)
{VAP.setText("30");}
else
{VAP.setText("0");
VAQ.setText("0");}
int a1,a2,a3,a4,a5,a6,a7,a8,a9,a10;
a1=Integer.parseInt(STP.getText());
a2=Integer.parseInt(CHP.getText());
a3=Integer.parseInt(VAP.getText());
a4=Integer.parseInt(STQ.getText());
a5=Integer.parseInt(CHQ.getText());
a6=Integer.parseInt(VAQ.getText());
a7=a1*a4;
a8=a2*a5;
a9=a3*a6;
STT.setText(""+a7);
CHT.setText(""+a8);

VAT.setText(""+a9);
a10=a7+a8+a9;
OUT.setText(a10+"");

Code of Clear ButtonSt.setSelected(false);
Ch.setSelected(false);
Va.setSelected(false);
STT.setText("");
VAT.setText("");
CHT.setText("");
OUT.setText("");
STQ.setText("");
VAQ.setText("");
CHQ.setText("");
VAP.setText("");
STP.setText("");
CHP.setText("");

Code of Exit ButtonSystem.exit (0);

Q13. Design a class program to display a detail of a book ?
Ans.
Class Methodpublic class book {
String name,author;
int edition;
float price;
public book(){
this.name="";
this.author="";
edition=2000;
price=100.0f;
}
public book(String a,Stringb,intc,float d){
this.name=a;
this.author=b;
edition=c;
price=d;
}
void display(){
System.out.println("Name of the book is "+name);
System.out.println("Author of book is "+author);
System.out.println("Edition:-"+edition);
System.out.println("Price:-"+price);

}

Main Methodbook B1=new book ("The Canterville Ghost”, “Oscar Wilde",2012,55);
B1.display ();

Q14. Design program to display a student record table ?
Ans.

Class Methodvoid process(){
int a=0;
String name="",hname="";
doubleperc=0.0,hperc=0.0;
do{name=JOptionPane.showInputDialog("Enter Student's name:");
perc=Double.parseDouble(JOptionPane.showInputDialog("Enter Percentage Marks:"));
resTa.append(name+"t"+perc+"n");

if(hperc<perc){
hperc=perc;
hname=name;
}
a=JOptionPane.showConfirmDialog(null,"More Student info??");
}
while(a==JOptionPane.YES_OPTION);
if(a==JOptionPane.NO_OPTION){
JOptionPane.showMessageDialog(null,"Highest scorer is "+hname+" with "+hperc+"marks. ");
}
}

Main MethodJOPdialogs j1=new JOPdialogs();
j1.setVisible(true);
j1.process();
j1.setVisible(false);

Q15. Design a class program to print detail of a student?
Ans.
Class Methodpublic class Student{
introllNumber = 0;
String name = "nil";
public Student(intrno,Stringsname){
rollNumber=rno;
name=sname;
}
void display(){
System.out.println("RollNumber ="+rollNumber);
System.out.println("Name ="+name);
}

Main MethodStudentB1=new Student(23,"GOVIND");
B1.display();
}
}

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