java io 文件过滤1

FilenameFilter接口包含accpet 方法,该方法将依次对指定File的所有子目录,子文件夹进行迭代,如果该方法返回true,则list方法会列出该子目录或者子文件夹

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    import java.io.*; 
    class MyFileNameFilter implements FilenameFilter 
    { 
       public boolean accept(File dir,String name)  
        { 
            //如果文件以.java结尾,或者文件对应一个路径,返回true 
            return name.endsWith(".java") || new File(name).isDirectory(); 
        } 
    } 

import java.io.*; class MyFileNameFilter implements FilenameFilter { public boolean accept(File dir,String name) { //如果文件以.java结尾,或者文件对应一个路径,返回true return name.endsWith(".java") || new File(name).isDirectory(); } }
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    public class FileNameFilterTest  
    { 
        public static void main(String[] args)  
        { 
            File file = new File("."); 
            String[] nameList = file.list(new MyFileNameFilter()); 
            for(String name : nameList) 
            { 
                System.out.println(name); 
           } 
       } 
   } 

public class FileNameFilterTest { public static void main(String[] args) { File file = new File("."); String[] nameList = file.list(new MyFileNameFilter()); for(String name : nameList) { System.out.println(name); } } }输出:
Apple.java
CreateInnerInstance.java
DiscernVariable.java
FileNameFilterTest.java
FileTest.java
Gender.java
GenderDesc.java
Leaf.java
LocalInnerClass.java
Mid.java
MyFileNameFilter.java
old files
Operation.java
Out.java
Person.java
PrintObject.java
Product.java
Root.java
Singleton.java
StringTest.java
SubClass.java
template.java
Test.java
TestAnonymous.java
TestCollection.java
TestGender.java
TestScannerKeyBoard.java
TestSingleton.java
TestSynchronized.java
TestToString.java
TestWeakHashMap.java