38、Java IO 操作与用户交互全解析

Java IO 操作与用户交互全解析

1. PrintWriter 示例应用

PrintWriter 类可用于将格式化数据写入文件。以下是一个示例代码：

import java.io.*;
public class PrintWriterSample {
    public static void main(String[] args) throws IOException {
        File source = new File("zoo.log");
        try (PrintWriter out = new PrintWriter(
                new BufferedWriter(new FileWriter(source)))) {
            out.print("Today's weather is: ");
            out.println("Sunny");
            out.print("Today's temperature at the zoo is: ");
            out.print(1/3.0);
            out.println('C');
            out.format("It has rained 10.12 inches this year");
            out.println();
            out.printf("It may rain 21.2 more inches this year");
        }
    }
}
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