import java.io.FileWriter;

import java.io.FileReader;

import java.io.IOException;

public class FileReadWrite {

public static void main(String[] args) {

String filePath = "test.txt";

// 寫入文件

try (FileWriter writer = new FileWriter(filePath)) {

writer.write("你好，Java 文件寫入演示！");

System.out.println("寫入完成！");

} catch (IOException e) {

e.printStackTrace();

}

// 讀取文件

try (FileReader reader = new FileReader(filePath)) {

int ch;

System.out.print("讀取內容：");

while ((ch = reader.read()) != -1) {

System.out.print((char) ch);

}

} catch (IOException e) {

e.printStackTrace();

}

}

}import java.io.FileWriter;

import java.io.FileReader;

import java.io.IOException;

public class FileReadWrite {

public static void main(String[] args) {

String filePath = "test.txt";

import java.io.FileWriter;

import java.io.FileReader;

import java.io.IOException;

public class FileReadWrite {

public static void main(String[] args) {

String filePath = "test.txt";

// 寫入文件

try (FileWriter writer = new FileWriter(filePath)) {

writer.write("你好，Java 文件寫入演示！");

System.out.println("寫入完成！");

} catch (IOException e) {

e.printStackTrace();

}

// 讀取文件

try (FileReader reader = new FileReader(filePath)) {

int ch;

System.out.print("讀取內容：");

while ((ch = reader.read()) != -1) {

System.out.print((char) ch);

}

} catch (IOException e) {

e.printStackTrace();

}

}

}import java.io.FileWriter;

import java.io.FileReader;

import java.io.IOException;

public class FileReadWrite {

public static void main(String[] args) {

String filePath = "test.txt";