java basic programs1

 simple java programs for beginners in eclipse IDE

Data type example program in java using eclipse IDE

package javaproject1;

public class DataTypeExample {

public static void main(String a[])

{

byte b_value=126;

short s_value=32767;

int i_value=221133;

float f_value=3.14f;

double d_value=4.888;

char ch='a';

boolean bln=true; //true or false value only

System.out.println("java data type example program");

System.out.println(b_value);

System.out.println(s_value);

System.out.println(i_value);

System.out.println(f_value);

System.out.println(d_value);

System.out.println(b_value);

System.out.println(ch);

System.out.println(bln);

System.out.println("observe the output value carefully");

}

}

short explanation of data type in java

Different type variable declaration and printing program in eclipse IDE

package javaproject1;

public class Variable {

static int age=25; //static variable

int ID=498; // instance variable

public static void main(String args[])

{

String name="Habiba"; // local variable

System.out.println(name); // Habiba printed

System.out.println(age); // 25 printed

Variable object1=new Variable(); // object creation

System.out.println(object1.ID); // 498printed

}

} 

short explanation of variable in java

A java program to add two integer number using eclipse IDE

package javaproject1;

class Add{

public static void main(String a[])

{

System.out.println(10+20);//without variable creation

System.out.println();

int num1=10;//num1 is variable, int data type, 10 value

int num2=20;//integer number 20 assign variable num2

System.out.println(num1+num2);//adding two number with variable creation

}

}