技術標籤：JAVA_homework

使用Scanner & PrintWriter讀寫文字

package text1;

import java.io.FileNotFoundException;
import java.util.Scanner;

public class Scanner_PrintWriter {
    public static void main(String[] args) throws FileNotFoundException {
        //建立一個"input.txt的檔案"
        java.io.File file =
 
 new java.io.File("src/text1/input.txt");
        java.io.File file1 = new java.io.File("src/text1/output.txt");
        //給"input.txt"輸入內容

        try(java.io.PrintWriter output = new java.io.PrintWriter(file)){
            output.println("Hello World!");
            output.
 
print("114514");
        }
        Scanner input = new Scanner(file);
        try (java.io.PrintWriter output1 = new java.io.PrintWriter(file1);){
            while(input.hasNext()){
                String x = input.nextLine();
                output1.println(x);
                System.out.
 
println(x);
            }
        }

        input.close();
    }
}

讀寫結果：

InputStream 和 OutputStream讀寫檔案

package text2;
import java.io.*;
public class InputStream_OutputStream {
    public static void main(String[] args) throws Exception {
        InputStream fis = new FileInputStream("src/text2/input.txt");
        OutputStream fis1 = new FileOutputStream("src/text2/output.txt");
        int i;
        while((i = fis.read()) != -1){
            System.out.print((char)i);
            fis1.write(i);
        }
    }
}

讀寫結果：