import java.net.InetAddress;import java.net.UnknownHostException; public class IPDisplay { public static void main(String[] args) {// TODO Auto-generated method stub InetAddress ia = null;InetAddress[] ia2 = null; try {ia = InetAddress.getByName("www.daum.net");//URL로 접근System.out.println("server HostAddress : " + ia.getHostAddress());//호스트주소 출력System.out.println("server HostName : " + ia.getHos..
import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable; public class ObjectSerialize { public static void main(String[] args) {// TODO Auto-generated method stubObjectInputStream ois = null;ObjectOutputStream oos = null;FileInputStream fis = null;FileOutputStream fos ..
import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter; import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JOptionPane; public class FileBackup extends JFrame implements ..
import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileReader;import java.io.FileWriter; public class FileCopy { public static void main(String[] args) {// TODO Auto-generated method stub String str = null;try {BufferedReader reader = new BufferedReader(new FileReader("d:\\test.txt"));//기존의 텍스트 문서 읽음BufferedWriter writer = new BufferedWriter(new FileWriter("d:\\copy.txt")..
import java.io.File; public class FileDelete { public static void main(String[] args) {// TODO Auto-generated method stubdelete("D:\\test");//파일명 지정, 완벽한 일치} private static void delete(String filename) {// TODO Auto-generated method stubFile f = new File(filename);//전달받은 인자로 파일 객체 생성 if (!f.exists()) {//파일이 존재하지 않는 경우System.out.println("Delete : file cannot found : " + filename);System.exit(0);}..
import java.io.File; public class FileInfo { public static void main(String[] args) {// TODO Auto-generated method stubString str = ""; File file = new File("F:\\TreeMapEx1.txt"); if (file.exists()) {// F:\\TreeMapEx1.txt 파일이 존재하는 경우str += "파일명:" + file.getName() + "\n" + "파일의 크기:" + file.length()+ "\n" + "마지막 수정일:" + file.lastModified() + "\n"+ "부모 디렉토리:" + file.getParent();} else {str = "해당 파일..
import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException; public class DataIOTest { public static void main(String[] args) {// TODO Auto-generated method stub// 텍스트파일에 데이터를 출력하고// 다시 불러 들어와 콘솔화면에 출력해주는 프로그램 try {DataOutputStream dataout = new DataOutputStream(new F..
import java.io.RandomAccessFile; public class RandomFileTest { public static void main(String[] args) {// TODO Auto-generated method stub String output = "";String str = ""; try {RandomAccessFile file = new RandomAccessFile("d:\\randomtest.txt","rw");String k = new String("Bye Bye Java");file.seek(file.length()); // seek 위치 조정(마지막으로)file.write(k.getBytes());file.writeChar('\n');//파일에 쓰기file.seek..