Java Tutorial: BufferedReader Example

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
*
* @author paiman
*/
public class HelloBufferedReader {

public static void main( String[] args ) throws IOException{
BufferedReader br = new BufferedReader(new InputStreamReader( System.in) );
String name;
System.out.print("Please Enter Your Name: ");
name = br.readLine();
System.out.println("Hello, " + name +"! Thank you for visiting my blog :)");
}
}

Java Tutorial: Thread Example

Two ways of Creating Thread

1. Extending from Thread class

• Extends a class from the Thread class
• Override the run( )
• Create an instance of the above class
• Start the Thread

/**

*

* @author paiman

*/

class DispThread extends Thread{

String msg;

public DispThread(String msg) {

this.msg = msg;

}

@Override

public void run(){

for(int i=0; i<5;i++){

System.out.println(msg);

}

}

}

/**

*

* @author paiman

*/

public class ThreadTest {

public static void main (String[]args){

DispThread dt1 = new DispThread("Thread");

DispThread dt2 = new DispThread("Example");

dt1.start();

dt2.start();

}

}

2. Implementing Runnable

• Implement Runnable on a class
• Implement the run( ) of the Runnable interface
• Create an instance of the above class
• Create a Thread object by passing the Runnable object as parameter
• Start the Thread

/**

*

* @author paiman

*/

public class DispThread2 implements Runnable{

String msg;

public DispThread2(String msg) {

this.msg = msg;

}

@Override

public void run(){

for(int i=0; i<5;i++){

System.out.println(msg);

}

}

}

/**

*

* @author paiman

*/

public class ThreadTest2 {

public static void main (String[]args){

DispThread2 dt1 = new DispThread2("Thread");

DispThread2 dt2 = new DispThread2("Example");

Thread t1 = new Thread(dt1);

Thread t2 = new Thread(dt2);

t1.start();

t2.start();

}

}

Java Tutorial: Array Example

import java.io.BufferedReader;

import java.io.InputStreamReader;

/**

*

* @author paiman

*/

public class AverageValue {

public static void main(String[] args) throws Exception {

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

double[] nilai = new double[4];

System.out.print("Value A : ");

nilai[0] = Double.parseDouble(in.readLine());

System.out.print("Value B : ");

nilai[1] = Double.parseDouble(in.readLine());

System.out.print("Value C : ");

nilai[2] = Double.parseDouble(in.readLine());

nilai[3] = (nilai[0] + nilai[1] + nilai[2])/3;

System.out.println("\nAverage value = " + nilai[3]);

}

}

Java Tutorial: Scanner Example

import java.util.Scanner;

/**

*

* @author paiman

*/

public class HelloScanner {

public static void main(String[] args) {

Scanner input = new Scanner( System.in );

System.out.print ("What is your name? ");

String name = input.nextLine();

System.out.println("Hello, "+name+"! Welcome to my blog :)");

}

}

import java.util.Scanner;

/**

*

* @author paiman

*/

public class RectangleWide {

public static void main(String[] args) {

Scanner input = new Scanner( System.in );

System.out.print ("Input long: ");

int l = input.nextInt();

System.out.print ("Input width: ");

int w = input.nextInt();

System.out.println("Rectangle wide: "+l*w);

}

}

import java.util.Scanner;

/**

*

* @author paiman

*/

public class CircumferenceOfACircle {

public static void main(String[] args) {

Scanner input = new Scanner( System.in );

System.out.print ("Input radius: ");

double r = input.nextDouble();

double pi = 3.142857143;

double circumference = 2*pi*r;

System.out.println("The circumference of a Circle with radius "+r+" is "+circumference);

}

}

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