第三題

import java.io.FileInputStream;import java.io.DataInputStream;import java.io.IOException;import java.io.PrintStream;import java.io.FileOutputStream;import java.io.IOException;/*此檔案使用indata.txt輸入*/class StringFileIO {public static void main (String args[]) {String thisLine;for (int i=0; i < args.length; i++) {try {FileInputStream fin = new FileInputStream(args[i]);FileOutputStream fout = new FileOutputStream("outdata.txt");try {DataInputStream myInput = new DataInputStream(fin);PrintStream myOutput = new PrintStream(fout);try {while ((thisLine = myInput.readLine()) != null) {System.out.println(thisLine);myOutput.println(thisLine);}}catch (Exception e) {System.err.println("Error: " + e);}}catch (Exception e) {System.err.println("Error: " + e);}}catch (Exception e) {System.err.println("failed to open file " + args[i]);System.err.println("Error: " + e);}}}}