5. For, While and Do While Loops in Java :
import java.io.*;
import java.util.*;
/**
*
* @author pranshu
*/
public class Loops_pranshu {
public static void main(String[] args) throws IOException
{
System.out.println("Hello, Welcome to Pranshu's loops...");
System.out.println("\nHow many times do you want to loop?? ");
Scanner scn = new Scanner(System.in);
int times = scn.nextInt();
System.out.println("You Entered " + times);
for(int i = 1; i <= times ; i++)
System.out.println("Inside For Loop, The no. is " + i );
int i = 1;
do
{
System.out.println("Inside Do-While Loop, The no. is " + i );
i++;
} while(i <= times);
i = 1;
while( i <= times)
{
System.out.println("Inside While Loop, The no. is " + i );
i++;
}
}
}
6. Conversion From Decimal to Binary in Java, Source code:
/**
*
* @author root
*/
public class conversions_pranshu {
public static void main(String[] args) throws IOException
{
System.out.println("Enter a Decimal : ");
BufferedReader brobj = new BufferedReader (new InputStreamReader(System.in));
String dec = brobj.readLine();
int dec2 = Integer.parseInt(dec);
String bin = Integer.toBinaryString(dec2);
System.out.println("The Binary is : " + bin);
}
}
7. Search for a Word in Text or String, Java Source code :
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
*
* @author pranshu
*/
public class matchtext {
public static void main(String[] args)
{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter Text: ");
try
{
String text = br.readLine();
System.out.println("Enter the word to match : ");
String word = br.readLine();
String[] strarr = text.split(" ");
int flag =0;
for(String str:strarr)
{
if(str.equalsIgnoreCase(word))
{
System.out.println(word + " exists in " + text);
flag = 1;
}
}
if(flag == 0)
System.out.println("No match found");
}
catch(IOException e)
{
e.printStackTrace();
}
}
}
8. File Handling Program in Java : Write to a File:
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
/**
*
* @author pranshu
*/
public class filehandle_pranshu {
public static void main(String[] args) throws IOException
{
String com = "comment";
String name = "uname";
String ipadd = "127.0.0.1" ;
FileWriter fstream = new FileWriter("/root/comments.txt",true);
BufferedWriter fbw = new BufferedWriter(fstream);
fbw.write(name + "__" + ipadd + ": ");
fbw.write(com);
fbw.newLine();
System.out.println("Done Writing...");
System.out.println("Closing File now...");
fbw.close();
}
}
