方便指定文件类型过滤器

    public static void main(String[] args) throws IOException {
    
        method_7();
    }
    public static void method_7() {
        File file=new File("c:\\");
        File[] names=file.listFiles(new SuffixFilter(".java"));//得到文件目录

        for(File name:names)
        {
            sop(name);
        }        
    }

实现的接口

package Demo1;

import java.io.File;
import java.io.FilenameFilter;

public class SuffixFilter implements FilenameFilter {
    private String suffix;
    public SuffixFilter(String suffix) {
        super();
        this.suffix=suffix;
    }
    @Override
    public boolean accept(File dir, String name) {
        // TODO Auto-generated method stub
        return name.endsWith(suffix);
    }

}

可以查出隐藏文件的接口

public class FileByhidden implements FileFilter {

    @Override
    public boolean accept(File pathname) {
        
        return pathname.isHidden();
        
    }

}