a.txt中有字符串hello !!! 将其变成hello World !!!,用Java写
时间: 2023-12-01 12:04:48 浏览: 25
以下是Java代码实现:
```java
import java.io.*;
public class Main {
public static void main(String[] args) {
try {
// 读取文件
File file = new File("a.txt");
BufferedReader reader = new BufferedReader(new FileReader(file));
String line = reader.readLine();
reader.close();
// 替换字符串
String newLine = line.replace("!!!", "World !!!");
// 写入文件
BufferedWriter writer = new BufferedWriter(new FileWriter(file));
writer.write(newLine);
writer.close();
System.out.println("替换成功!");
} catch (IOException e) {
e.printStackTrace();
}
}
}
```