Java實現數組的添加、刪除、尋找（基礎型）

/*delete add find */public class ArrayTest {/** * @param args *//*定義數組大小*/private static int COUNT=40;public static int[] arr=new int[COUNT];/*定義當前數組的個數，為了和下標統一，以0開頭*/private int currentNumber=0;public ArrayTest(){}/*向數組中添加值*/public void add(int value){if(currentNumber < arr.length){arr[currentNumber]=value;currentNumber++;}}/*判讀當前數組是否為空白*/public boolean isNull(){if(currentNumber<0)return true;else {return false;}}/*刪除數組中的特定值*/public void delete(int value){if(! isNull()){int flag=-1;flag=find(value);if(flag != -1){for(int j=flag;j<currentNumber-1;j++){arr[j]=arr[j+1];/*和後面的*/}arr[currentNumber-1]=0;currentNumber--;}else{System.out.println("Not Exist");}}}public int find(int value){int flag=-1;for(int i=0;i<currentNumber;i++){if(arr[i]==value){flag=i;break;}}//end forreturn flag;}public static void main(String[] args) {// TODO Auto-generated method stubArrayTest arrObj = new ArrayTest();   for(int i=0;i<24;i++){   arrObj.add(i);   }    System.out.println(arrObj.find(13));      arrObj.delete(12);   arrObj.delete(4);   arrObj.add(13);     for(int i:arr){   System.out.print(i+",");   }}}