<!-- https://mvnrepository测试数据/artifact/org.apache测试数据mons/commons-lang3 -->

< dependency >

     < groupId >org.apache测试数据mons</ groupId >

     < artifactId >commons-lang3</ artifactId >

     < version >3.11</ version >

</ dependency >

public class ArraryTest {

     public static void main(String[] args) {

         int []array={ 4 , 5 , 9 };

         //add()添加方法结果为：{4,5,9,6}

         int [] newArray=ArrayUtils.add(array, 6 );

         System.out.println(ArrayUtils.toString(newArray));

         //addAll()方法,结果为：{4,5,9,5,9,6,7}

         int []arrayAll={ 4 , 5 , 9 };

         int [] newArrayAll=ArrayUtils.addAll(arrayAll, 5 , 9 , 6 , 7 );

         System.out.println(ArrayUtils.toString(newArrayAll));

         //contains():结果为：true、false

         System.out.println(ArrayUtils.contains(arrayAll, 9 ));

         System.out.println(ArrayUtils.contains(arrayAll, 3 ));

         //getLength():结果为3

         System.out.println(ArrayUtils.getLength(arrayAll));

         //indexOf():2。

         //indexOf(newArrayAll, 9,3):3是指定从哪一位开始查找，返回结果4

         System.out.println(ArrayUtils.indexOf(newArrayAll, 9 ));

         System.out.println(ArrayUtils.indexOf(newArrayAll, 9 , 3 ));

         //lastIndexOf()返回结果是4、2

         System.out.println(ArrayUtils.lastIndexOf(newArrayAll, 9 ));

         System.out.println(ArrayUtils.lastIndexOf(newArrayAll, 9 , 3 ));

         //insert():结果为{4,5,3,9}

         int [] arr=ArrayUtils.insert( 2 , arrayAll, 3 );

         System.out.println( "insert" +ArrayUtils.toString(arr));

         //isEmpty():结果为false、true

         int []a= null ;

         System.out.println(ArrayUtils.isEmpty(arr));

         System.out.println(ArrayUtils.isEmpty(a));

         //isNotEmpty()：结果是false、true

         System.out.println( "isNotEmpty:" +ArrayUtils.isNotEmpty(a));

         System.out.println( "isNotEmpty:" +ArrayUtils.isNotEmpty(arr));   

         //isSorted():结果为false和true

         int []sort1={ 5 , 6 , 9 , 1 };

         int [] sort2={ 1 , 6 , 8 , 9 };

         System.out.println( "sort1:" +ArrayUtils.isSorted(sort1));

         System.out.println( "sort2:" +ArrayUtils.isSorted(sort2));

         //remove():返回结果为{5,6,1}

         int [] newRe=ArrayUtils.remove(sort1, 2 );

         for ( int nr:newRe){

             System.out.print(nr);

         }

         //reverse():返回new reverse:{1,9,6,5}

         ArrayUtils.reverse(sort1);

         System.out.println( "new reverse:" +ArrayUtils.toString(sort1));

         //subarray():返回结果subarray:{3,9}

         int [] sub={ 7 , 5 , 3 , 9 , 8 , 4 };

         int [] newsub=ArrayUtils.subarray(sub, 2 , 4 );

         System.out.println( "subarray:" +ArrayUtils.toString(newsub));

         Object[] subs={ 7 , 5 , 3 , 9 , 8 , 4 };

         Map<Object, Object>map=ArrayUtils.toMap(subs);   

     }

}