Common Java Methods

One, array

declaration of the array:  

Mode one: String [] str1=new string[10];
Mode two: String [] str2={"A", "V"};

1. Divide a large array into n decimal groups

 Public Static<T> list<object[]> ARRAYSPL (T [] str,intnum) {        if(str==NULL|| Str.length==0){            Throw NewNullPointerException ("Array cannot be empty"); }        if(num==0){            Throw NewNumberFormatException ("Can't be 0"); }        intStrlength=str.length;//the length of the array        intLen= (strlength%num==0) strlength/num:strlength/num+1;//number of new arrayslist<object[]>listarray=NewArraylist<object[]>(); if(num>=strlength)        {Listarray.add (str); }Else{Object [] arr2=NULL;  for(inti=0;i<len;i++){                 intM=0; ARR2=NewObject[num]; if(strlength%num!=0){                     if(i+1==Len) {ARR2=Newobject[strlength-(i*num)]; }                 }                  for(intj=i*num;j<strlength;j++) {m++; Arr2[m-1]=Str[j]; if(m==num) {m=0;  Break;            }} listarray.add (ARR2); }        }

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Common Java Methods