NetBeans 10

Tips:

For checking Condition use if

For using choice use Switch()

For repeated loop use for,while or do while

lesson 9

private void txtsStateChanged(javax.swing.event.ChangeEvent evt) {                                  

int c = txts.getValue();

txtc.setText(""+c+"CELCIUS");

int f = ((c*9)/5)+32;

txtf.setText(""+f+"FAHRENHEIT");

    }

netbeans lesson 8

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                        

System.exit(0);

    }                                       

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                        

 txtcn.setText(" ");

 txtp.setText(" ");

 txtt.setText(" ");

 txtr.setText(" ");

 txtsi.setText(" ");

 txtta.setText(" ");

    }                                       

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        

String cn = txtcn.getText();

int p = Integer.parseInt(txtp.getText());

int t = Integer.parseInt(txtt.getText());

int r = Integer.parseInt(txtr.getText());

double s,ta ;

s = (p * r * t)/100 ;

ta = ( p+s) ;

txtsi.setText(" "+s);

txtta.setText(" "+ta);

    }                                       

    /**

    * @param args the command line arguments

    */

    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {

                new SI().setVisible(true);

            }

        });

    }

Netbeans Lesson 7

Example 1. Write a program to print the output like below.
1
10
100
1000
.
.
10 term.
Program:-

int a,b;
a=1;b=1;
while (a<=10)
{
system.out.print(b)
b=b*10;
a++;
}

Netbeans Lesson 6

While Loop:
While statement is used to execute the set of instruction in its loop untill the condition is true. It will keep on executing the commands in its loop untill the condition become false.
Syntax :
while (<expression or condtion>)
{
set of statements
.
.
n;
}

Example
To the following series with while loop.
1,2,3,4,----------10

int a;
a=1;
while(a<=10)
{
System.out.print(a);
a++;
}

if want to print this in c Language or c++ then simply write printf(a) in c and cout<<a in c++ to get the same result.

Netbeans Lesson 5

Q4. To find eligibility for vote.

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

int age;

String txt = txta.getText();

age = Integer.parseInt(txt);

if(age>=18)

    txtm.setText("YOU ARE ELIGIBLE VOTER");

else

    txtm.setText("YOU ARE NOT ELIGIBLE FOR VOTING");

    }

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {

System.exit(0);

    }

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {

txtm.setText(" ");

txta.setText(" ");

    }

mysql lesson 3

mysql> UPDATE EMP SET SAL =850 WHERE SAL =800;

Query OK, 1 row affected (0.10 sec)

Rows matched: 1  Changed: 1  Warnings: 0SELECT * FROM EMP WHERE JOB='CLERK' AND COMM<=100 ;

mysql> ALTER TABLE EMP MODIFY JOB CHAR(30);

Query OK, 1 row affected (0.27 sec)

Records: 1  Duplicates: 0  Warnings: 0

EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
8369	SMITH	CLERK	8902	1990-12-18	800	100	20
8999	HARPREET	CLERK	8878	1992-03-20	300	100	20

SELECT * FROM EMP WHERE(JOB = 'SALESMAN' AND SAL>= 300) OR (JOB = 'MANAGER' AND SAL>= 200);

EMPNO	ENAME	JOB	MGR	HIREDATE	SAL	COMM	DEPTNO
8499	ANYA	SALESMAN	8698	1991-02-20	1600	300	30
8521	SETH	SALESMAN	8698	1991-02-22	1250	500	30
8566	MAHADEVAN	MANAGER	8839	1991-04-02	2985	200	20
8698	BINA	MANAGER	8839	1991-05-01	2850	400	30
8839	AMIR	MANAGER	8840	1991-11-18	3000	200	10
8993	TAJINDER	SALESMAN	8888	1992-03-11	3300	210	10