package com.bjpowernode.demo03;

import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**

• 使用FileReader/FileWriter實現文字檔案的複製
• @author Administrator

*/
public class Test02 {

public static void main(String[] args) {
	
	String srcFile = "D:/course/JavaProjects/03-JavaSE/Day08/src/com/bjpowernode/demo03/Test01.java"	;
	String destFile = "d:/test01.java"	;
	
	copyFile( srcFile, destFile);
}
//一次複製一個字元陣列, 自動關閉流
private static void copyFile(String srcFile, String destFile) {
	try (
			FileReader fr = new FileReader(srcFile);
			FileWriter fw = new FileWriter(destFile);
			){
		char [] contents = new char[20];
		int len = fr.read(contents);
		while( len != -1 ){
			fw.write(contents, 0 , len);
			 len = fr.read(contents);
		}
		
	} catch (Exception e) {
	}
}

// 一次複製一個字元, 手動關閉流, 異常處理
private static void copyFile2(String srcFile, String destFile) {
	FileReader fr = null; 
	FileWriter fW = null; 
	try {
		fr = new FileReader(srcFile);
		fW = new FileWriter(destFile);
		
		int cc = fr.read();
		while( cc != -1){
			fW.write(cc);
			cc = fr.read();
		}
		
	} catch (Exception e) {
		
	}finally {
		if ( fr != null) {
			try {
				fr.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		if (fW != null ) {
			try {
				fW.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
}
 

}