File中文件改名

package org.example;
 
import java.io.File;
 
public class day03 {
    public static void main(String[] args) {
        //文件重命名
        final File f1 = new File("d:/temp/day03/合并后的视频.mp4");
        final String name = f1.getName();
        final String name1 = name.substring(0, name.indexOf("."));
        final String type = name.substring(name.indexOf("."));
        String newName = "改名"+type;
        f1.renameTo(new File("d:/temp/day03",newName));
 
    }
}