Io filewriter filereader Learning

import java.awt.Frame;import java.io.*;public class filewriter {/** * @param args */public static void main(String[] args) throws IOException{// TODO Auto-generated method stub//test1();test2();}static void test1()throws IOException{FileWriter fw = new FileWriter("F:\\fd.txt");fw.write("sfasf");fw.flush();fw.write("zzzzz");fw.flush();fw.close();fw = new FileWriter("F:\\fd.txt", true);fw.write("cccc");fw.flush();fw.close();}static void test2(){FileWriter fw = null;try {fw = new FileWriter("F:\\fd2.txt");fw.write("wzz");} catch (IOException e) {// TODO: handle exceptionSystem.out.println(e.toString());}finally{try {if(fw!=null)fw.close();} catch (IOException e2) {// TODO: handle exceptionSystem.out.println(e2.toString());}}}}

import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class filereader {/** * @param args */public static void main(String[] args)throws IOException {// TODO Auto-generated method stub//test1()//test2();//test3();//test4();test5();}static void test1()throws IOException{FileReader fr = new FileReader("F:\\fd.txt");int c;while((c = fr.read()) != -1){System.out.println((char)c);}fr.close();}static void test2()throws IOException{FileReader fr = new FileReader("F:\\fd.txt");char[] buf = new char[3];int x;while((x = fr.read(buf)) != -1){System.out.println(buf);}fr.close();}static void test3()throws IOException{FileReader fReader = new FileReader("F:\\fd.txt");char[] buf = new char[2];int x;while((x = fReader.read(buf))!= -1){System.out.print(new String(buf, 0, x));}}static void test4()throws IOException{FileWriter fw = new FileWriter("F:\\fd3.txt");FileReader fr = new FileReader("F:\\fd2.txt");int x;while((x = fr.read())!=-1){fw.write(x);}fw.close();fr.close();}static void test5(){FileWriter fw = null;FileReader fr = null;try {fw = new FileWriter("F:\\fd3.txt");fr = new FileReader("F:\\fd2.txt");int len = 0;char[] buf = new char[1024];while((len = fr.read(buf)) != -1){fw.write(buf, 0, len);}} catch (Exception e) {// TODO: handle exceptionSystem.out.println(e.toString());}finally{try {if(fw != null)fw.close();} catch (IOException e2) {// TODO: handle exceptionSystem.out.println(e2.toString());}try {if(fr!=null)fr.close();} catch (IOException e2) {// TODO: handle exceptionSystem.out.println(e2.toString());}}}}

Copy of the continued text read from filewriter filereader