封装自定义数组类（java版）

标签：java   自定义   数组   封装   

package com.huowolf.test;

public class MyOrderedArray {
		private long[] arr;
		
		//数组中有效元素的多少
		private int elems;
		
		public MyOrderedArray() {
			arr = new long[50];
		}
		
		public MyOrderedArray(int length) {
			arr = new long[length];
		}
		
		//插入数据
		public void insert(long value) {
			int i;
			for ( i = 0; i < elems; i++) {
				if(arr[i]>value)  break;		
			}
			
			for(int j = elems; j > i; j--) {
				arr[j] = arr[j-1];
			}
			arr[i] = value;
			elems++;
		}
		
		//显示数据
		public void display() {
			for (int i = 0; i < elems; i++) {
				System.out.print(arr[i]+" ");
			}
			System.out.println();
		}
		
		//查找数据 （线性查找）
		public int find(long searchValue) {
			int i;
			for ( i = 0; i < elems; i++) {
				if(arr[i] == searchValue) 	break;
			}
			
			if(i == elems)
					return -1;
			else 
					return i;			
		}
		
		//二分查找
		public int binaryFind(long searchValue) {
			int left,right,mid;
			left = 0;
			right = elems;
			while(left <= right)
			{
				mid = (left+right) /2;
				if(arr[mid] > searchValue) {
					right = mid -1;		//调整右边界
				}else if(arr[mid] < searchValue) {
						left = mid+1;	//调整左边界
					}
				else return mid;
			}
			return -1;
		}
		
		//删除数据
		public void delete(long deleteValue){
			if(find(deleteValue) == -1) {
				System.out.println("查找不到指定数据，删除失败");
			}else {
				for (int i = find(deleteValue); i < elems; i++) {
					arr[i] = arr[i+1];
				}
				elems--;
			}
		}
		
		//修改数据
		public void change(long oldValue,long newValue) {
			if(find(oldValue) == -1) {
				System.out.println("查找不到指定数据，修改失败");
			}else {
				arr[find(oldValue)] = newValue;
			}
		}
		
}

封装自定义数组类（java版）

标签：java   自定义   数组   封装   

原文地址：http://blog.csdn.net/huolang_vip/article/details/43272261