Java Program on How to Write Data in File
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Program 1
package dataflair; import java.io.*; public class TestWrite1 { public static void main(String[] args) throws IOException { FileOutputStream fos=null; byte b[]; try { File F=new File("d://filedata"); F.mkdir(); fos=new FileOutputStream("d://filedata/student.txt"); char ch; String S="Data Flair free course with free certificate ,Indore MP India"; b=S.getBytes(); fos.write(b); // for(int i=0;i<b.length;i++) // System.out.print(" "+b[i]); fos.flush(); // for(int i=0;i<S.length();i++) // { // ch=S.charAt(i); // fos.write(ch); // } System.out.println("File Created......."); } finally { fos.close(); } } }
Program 2
package dataflair; import java.io.*; public class TestFileWrite2 { public static void main(String[] args) throws IOException { FileOutputStream fos=null; byte b[]; try { File F=new File("d://filedata"); F.mkdir(); fos=new FileOutputStream("d://filedata/student.txt"); char ch; String S="Data Flair Free Course With Free Certificate ,Indore MP India"; for (int i = 0; i < S.length(); i++) { ch=S.charAt(i); if(Character.isUpperCase(ch)) fos.write(ch); } System.out.println("File Created......."); } finally { fos.close(); } } }
Program 3
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package dataflair; import java.io.*; /** * * @author admin */ public class TestFileWrite3 { public static void main(String[] args) throws IOException { FileOutputStream fos=null; byte b[]; try { File F=new File("d://filedata"); F.mkdir(); File F1=new File("d://filedata/student123.txt"); fos=new FileOutputStream(F1); char ch; String S="Data Flair Free Course With Free Certificate ,Indore MP India"; for (int i = 0; i < S.length(); i++) { ch=S.charAt(i); if(Character.isUpperCase(ch)) fos.write(ch); } System.out.println("File Created......."); } finally { fos.close(); } } }
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