The java=== array tool class is created, and the description document is exported using Eclipse. html

 PackageCn.china;//import java.util.Arrays;//import Java.util.Scanner;/*** Array Tool class, and the class internal methods are static methods, do not provide initialization object calls!!! * Includes array sorting, maximum value, find and more methods *@authorWang Daxia *@versionV1.0*/ Public classArraytool {PrivateArraytool () {}/*** Array selection sort *@paramarr passes an array to validate the program*/     Public Static voidArraySort (int[]arr] {         for(intx=0;x<arr.length-1;x++){             for(inty=x+1;y<arr.length;y++) {Exchange (arr, x, y); }        }    }    Private Static voidExchangeint[]arr,intXinty) {        if(arr[x]>Arr[y]) {            inttemp=Arr[x]; ARR[X]=Arr[y]; Arr[y]=temp; }    }    /*** Bubble Array Sort *@paramarr passes an array for validator * Incoming Array validator*/     Public Static voidArraysort2 (int[]arr] {         for(intx=0;x<arr.length-1;x++){             for(inty=0;y<arr.length-1-x;y++) {Exchange (arr, y, y+1); }        }    }    /*** Array Maximum value extraction *@paramarr passes an array to validate the program *@returnMax Returns the maximum value*/     Public Static intArraymaxint[]arr] {        intMax=arr[0];  for(intx=0;x<arr.length;x++){            if(max<Arr[x]) {Max=Arr[x]; }        }        returnMax; }    /**array Minimum value extraction@paramarr passes an array to validate the program@returnreturns the minimum value*/     Public Static intArraymin (int[]arr] {        intMin=arr[0];  for(intx=0;x<arr.length;x++){            if(min<Arr[x]) {min=Arr[x]; }        }        returnmin; }    /*** Find array elements *@paramarr passes an array to validate the program *@paramkey to pass in a data to find *@returnx Returns the look-up data in the array with the corner label *@return-1 data not found return-1*/       Public Static intArraysearch (int[]arr,intkey) {         for(intx=0;x<arr.length;x++){            if(arr[x]==key) {System.out.println ("Find data in an array with a corner labeled as:"); returnx; }} System.out.println ("No related element found in array"); return-1; }//Public void Arraysdelete () {//Scanner SC =new Scanner (system.in);//int[] arr = new int[]{1,2,4,5,9,8,0};//System.out.println (arrays.tostring (arr));//System.out.println ("Please enter the number of elements to delete:");//int n = sc.nextint (); Sc.close ();//arr[n-1] = arr[arr.length-1];//arr = arrays.copyof (arr, arr.length-1);//System.out.println (arrays.tostring (arr));////        }     /*** Array Inversion *@paramarr passes an array to validate the program*/     Public Static voidInvertarray (int[]arr] {        intHead=0; intTail=arr.length-1; intMid=arr.length>>1;  for(intx=0;x<mid;x++){            inttemp=Arr[head]; Arr[head]=Arr[tail]; Arr[tail]=temp; Head++; Tail--; }    }    /*** Print Array *@paramarr passes an array to validate the program*/     Public Static voidPrintarr (int[]arr] {System.out.print ("[");  for(intx=0;x<arr.length;x++){            if(x==arr.length-1) {System.out.print (arr[x]+"]"); }Else{System.out.print (arr[x]+","); }        }    }    /*** Print two-dimensional arrays and calculate the sum of the data within the two-dimensional array *@paramarr passes an array to validate the program *@returnSums returns the sum of two-dimensional array elements*/     Public Static intAddArray (int[][]arr] {        intSum=0;  for(intx=0;x<arr.length;x++){             for(inty=0;y<arr[x].length;y++){                //System.out.print (arr[x][y]+ ",");sum+=Arr[x][y]; }        }        returnsum; }    /*** Binary search * Precondition incoming array must be ordered *@paramarr passes an ordered array for validator *@paramkey incoming to search for data *@returnMid Returns the corner label of the search data in the array *@returnNo search data is found in the array, returns the inverse value of the insertion position of this data in this array*/      Public Static intBinarySearch (int[]arr,intkey) {          intMin=0; intMax=arr.length-1; intmid;  while(min<=max) {Mid= (Min+max) >>1; if(arr[mid]<key) {min=mid+1; }Else if(arr[mid]>key) {Max=mid-1; }Else{                    returnmid; }            }            return~min; }}

 PackageCn.china; Public classTestdriver { Public Static voidMain (string[] args) {//int[]arr={1,2,5,6,34,87,505};        int[][]arr={{11,2,5},{62,34},{871,50}}; //int Max=arraytool.arraymax (arr);                intA=Arraytool.addarray (arr);        System.out.println (a); //Arraytool.printarr (arr);    }}

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The java=== array tool class is created, and the description document is exported using Eclipse. html