Java统计文件数量

package com.vfsd;

import java.io.File;
import java.io.IOException;

/*******************************************************************************************************
 * Copyright: vc1.0 2018. All rights reserved.                    <br>
 * The whole package including this class is licensed under        <br>
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 * @author:           luozhubang                                    <br>
 * @version:         v1.0.0                                        <br>
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 * @Others: 暂无说明                                                <br>
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 * @Statement: If you are using the package or parts of it in any commercial way, a commercial license is required. <br>
 *   Visit <a href=‘http://www.bim-times.com‘>http://www.bim-times.com</a> for more information.<br>
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public class CountFileNum {
    private static int count1 = 0;
    public static void main(String[] args) throws IOException{
        String dir1="E:\\20190418_relationdata4\\";
        
        listFiles(dir1);
    }
    
    public static void listFiles(String filePath) throws IOException{
        File dirFile = new File(filePath);
        if(dirFile.isDirectory()) {
            File[] files1 = dirFile.listFiles();
            for(int i=0;i<files1.length;i++) {
                countNum(files1[i].getPath());
                System.out.println("count:"+count1+"     "+files1[i].getName());
                count1=0;
            }
        }
    }
    
    public static void countNum(String filePath) throws IOException{
        File dirFile = new File(filePath);
        if(dirFile.isDirectory()) {
            File[] files1 = dirFile.listFiles();
            for(int i=0;i<files1.length;i++) {
                if(files1[i].getName().endsWith("02.txt")) {
                    count1++;
                }
            }
            
        }
    }

}