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();
}
}

informatics practices practical file

More Related Content

What's hot (20)

Viewers also liked (8)

Similar to informatics practices practical file (20)

More from Sai Sathvick Chirakala (10)

Recently uploaded (20)

informatics practices practical file