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Learn More About Java2 Professional Tutrial Vol.4
I-ichirow Suzuki
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Learn More About Java2 Professional Tutrial
Chapter 1 変数とオブジェクト
Chapter 2 お約束とコメント
Chapter 3 メソッドと基本制御
Chapter 4 コンストラクタと初期化
Chapter 5 クラスの再利用
Chapter 6 継承
Chapter 7 ポリモフィズム
Chapter 8 インターフェイスとインナークラス
Chapter 9 コレクション
Chapter10 エラーハンドリング
Chapter11 ファイル入出力
Chapter12 Creating Windows AWT
Chapter13 Creating Windows Swing
Chapter14 Multiple Threads
Chapter15 ネットワーク
Chapter16 アルゴリズムとデータ構造
///////////////////////////////////////////////////////////////////////////////////////////
//// Chapter 11: ファイル入出力
//------------------------------------------------
// How to read from standard input.
import java.io.*;
public class Echo
{
public static void main(String[] args)
throws IOException
{
// KeyInput Ready...
BufferedReader in = new BufferedReader(
new InputStreamReader(System.in));
// Display out
String s;
while((s = in.readLine()).length() != 0)
System.out.println(s);
}
}
/**
Hello
Hello
Java
Java
*/
//------------------------------------------------
// Turn System.out into a PrintWriter.
import java.io.*;
public class ChangeSystemOut
{
public static void main(String[] args)
{
PrintWriter out = new PrintWriter(System.out, true);
out.println("Hello, world");
}
}
/**
Hello, world
*/
//------------------------------------------------
import java.io.*;
public class TestEOF
{
// Throw exceptions to console:
public static void main(String[] args)
throws IOException
{
// File Reading Ready...
DataInputStream in = new DataInputStream(
new BufferedInputStream(
new FileInputStream("TestEof.java")));
// File Reading and Display out
while(in.available() != 0)
System.out.print((char)in.readByte());
}
}
/**
import java.io.*;
public class TestEOF
{
// Throw exceptions to console:
public static void main(String[] args)
throws IOException
{
// File Reading Ready...
DataInputStream in = new DataInputStream(
new BufferedInputStream(
new FileInputStream("TestEof.java")));
// File Reading and Display out
while(in.available() != 0)
System.out.print((char)in.readByte());
}
}
*/
//------------------------------------------------
import java.io.*;
public class IOProblem
{
// Throw exceptions to console:
public static void main(String[] args) throws IOException
{
// File writing Ready...
DataOutputStream out = new DataOutputStream(
new BufferedOutputStream(
new FileOutputStream("Data.txt")));
// File writing
out.writeBytes("That was the value of pi\n");
out.writeBytes("This is pi/2:\n");
out.close();
// File Reading Ready...
DataInputStream in = new DataInputStream(
new BufferedInputStream(
new FileInputStream("Data.txt")));
// File Reading and Display out
while(in.available() != 0)
System.out.print((char)in.readByte());
}
}
/**
That was the value of pi
This is pi/2:
*/
//------------------------------------------------
// Demonstrates standard I/O redirection.
import java.io.*;
class Redirecting
{
// Throw exceptions to console:
public static void main(String[] args) throws IOException
{
BufferedInputStream in =
new BufferedInputStream(
new FileInputStream("Redirecting.java"));
PrintStream out =
new PrintStream(
new BufferedOutputStream(
new FileOutputStream("test.out")));
System.setIn(in);
System.setOut(out);
System.setErr(out);
BufferedReader br =
new BufferedReader(
new InputStreamReader(System.in));
String s;
while((s = br.readLine()) != null)
System.out.println(s);
out.close(); // Remember this!
}
}
/**
import java.io.*;
class Redirecting
{
// Throw exceptions to console:
public static void main(String[] args) throws IOException
{
BufferedInputStream in =
new BufferedInputStream(
new FileInputStream("Redirecting.java"));
PrintStream out =
new PrintStream(
new BufferedOutputStream(
new FileOutputStream("test.out")));
System.setIn(in);
System.setOut(out);
System.setErr(out);
BufferedReader br =
new BufferedReader(
new InputStreamReader(System.in));
String s;
while((s = br.readLine()) != null)
System.out.println(s);
out.close(); // Remember this!
}
}
*/
//------------------------------------------------
// Uses GZIP compression to compress a file
// whose name is passed on the command line.
import java.io.*;
import java.util.zip.*;
public class GZIPcompress
{
// Throw exceptions to console:
public static void main(String[] args) throws IOException
{
BufferedReader in =
new BufferedReader(
new FileReader("GZIPcompress.java"));
BufferedOutputStream out =
new BufferedOutputStream(
new GZIPOutputStream(
new FileOutputStream("test.gz")));
System.out.println("Writing file");
int c;
while((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
System.out.println("Reading file");
BufferedReader in2 =
new BufferedReader(
new InputStreamReader(
new GZIPInputStream(
new FileInputStream("test.gz"))));
String s;
while((s = in2.readLine()) != null)
System.out.println(s);
}
}
/**
import java.io.*;
import java.util.zip.*;
public class GZIPcompress
{
// Throw exceptions to console:
public static void main(String[] args) throws IOException
{
BufferedReader in =
new BufferedReader(
new FileReader("GZIPcompress.java"));
BufferedOutputStream out =
new BufferedOutputStream(
new GZIPOutputStream(
new FileOutputStream("test.gz")));
System.out.println("Writing file");
int c;
while((c = in.read()) != -1)
out.write(c);
in.close();
out.close();
System.out.println("Reading file");
BufferedReader in2 =
new BufferedReader(
new InputStreamReader(
new GZIPInputStream(
new FileInputStream("test.gz"))));
String s;
while((s = in2.readLine()) != null)
System.out.println(s);
}
}
*/
//------------------------------------------------
import java.io.*;
// A serializable class.
class Alien implements Serializable
{
}
// Create a serialized output file.
public class FreezeAlien
{
// Throw exceptions to console:
public static void main(String[] args)
throws IOException, ClassNotFoundException
{
ObjectOutput out =
new ObjectOutputStream(
new FileOutputStream("X.file"));
Alien zorcon = new Alien();
out.writeObject(zorcon);
out.close() ;
ObjectInputStream in =
new ObjectInputStream(
new FileInputStream("X.file"));
Object mystery = in.readObject();
System.out.println(mystery.getClass());
}
}
/**
class Alien
*/
]]>
I-ichirow Suzuki _/_/_/_/_/_/_/_/_/_/_
URL : www.kg-group.com Top Page
Mail : suzuki@kg-group.com
/_/_/_/_/_/_/_/_/_/_/_/_ ICQ : 3743158