Keywords are reserved words in java Programming language. Each keyword represents a specific meaning. These are used for specific purpose only.
We classified
the keywords based on usage and listed below.
- 1. Keywords based on datatypes.
- 2. Keywords based on loops and
conditional statements.
- 3. Keywords based on classes and objects
- 4. Keywords based on try catch
- 5. others
1.Keywords
based on datatype:
|
boolean |
Byte |
char |
int |
long |
|
Float |
Double |
strictfp |
volatile |
short |
class
Example
{
public static void main(String args[])
{
int a=10;
float b = 13.3f;
double c =45.67;
long d =34;
short e=5;
boolean f = true;
char g='j';
byte h=7;
System.out.println("integer a:"+a);
System.out.println("float b:"+b);
System.out.println("double c:"+c);
System.out.println("long d:"+d);
System.out.println("short e:"+e);
System.out.println("boolean f:"+f);
System.out.println("char g:"+g);
System.out.println("byte h:"+h);
}
}
Here, is
the output for the program.
2. Keywords based on loop and conditional statement:
|
do |
while |
continue |
break |
if |
|
else |
for |
switch |
case |
default |
Example:
class
Example1
{
public static void main(String args[])
{
int a = 1;
do
{
System.out.println(a);
a++;
}
while(a<=10);
}
}
The output
is
Replace do while part by
while(a<=10)
{
System.out.println(a);
a++;
}
If you are
using for loop, here is the code.
for( a
=1;a<=10;a++)
{
System.out.println(a);
}
Next, if conditional
statement code is given below.
if (a>5)
{
System.out.println(“a is greater than 5”);
}
else
{
System.out.println(“a is less than 5”);
}
Switch case
syntax is given below.
switch(expression)
{
case1: statements;
break;
case2:
statements;
break;
……………..
……………..
default:
Statements;
}
These are the way of using keywords in java programming part1 is completed. Next, part 2 shows the remaining keywords.
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