Java implementation decimal number to hexadecimal number

Now~let ' s begin our second question~

How do I use the Java language to convert decimal numbers to hexadecimal digits?

The first time I coded the effect was Jiangzi ~

/** *  */ PackageCom.succez.task2;ImportJava.util.Scanner;/*** <p>copyright:copyright (c) 2018</p> * <p>succez</p> *@authorZhangjinjin * @createdate May 3, 2018*/ Public classInttohex {/*** First enter an integer number to determine whether it is 0, if it is 0, then its 16 binary is also 0; * If number is not 0, then 16 is taken and converted to 16 binary corresponding character; * NUMBER=NUMBER/16, repeat process 2, 3, with character array s depending on Times to save each bit; * Output when the reverse output can be*/     Public Static voidMain (string[] args) {Scanner sc=NewScanner (system.in); intNumber =Sc.nextint (); inti = 0; Char[] S =New Char[100]; if(Number = = 0) {System.out.print (0); }        Else{             while(number!=0)              {                intT=number%16; if(t >=0 && t<10) {S[i]= (Char) (t+ ' 0 '); I++; }                Else{S[i]= (Char) (t+ ' A '-10); I++; } Number=number/16; }                          for(intj=i-1;j>=0;j--) {System.out.print (s[j]); }        }    }}

Of course It ' s true~

As can see from the picture~

However, after discussion, we found that although this can achieve its function, but it takes a lot of brains to think, then, it is clear to express it clearly ~

So, after some modification, this should be OK ~

/** *  */ PackageCom.succez.task2;ImportJava.util.Scanner;/*** <p>copyright:copyright (c) 2018</p> * <p>succez</p> *@authorZhangjinjin * @createdate May 4, 2018*/ Public classInttohex_alter {/*** This algorithm uses StringBuffer to be more efficient.*/     Public Static voidMain (string[] args) {//TODO auto-generated Method StubSystem.out.println ("Please enter the number of decimal to convert:"); Scanner input=NewScanner (system.in); intn =Input.nextint (); System.out.println ("The number of hexadecimal conversions is:" +Inttohex (n)); }    Private StaticString Inttohex (intN) {stringbuffer s=NewStringBuffer ();        String A; Char[]b = {' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' D ', ' E ', ' F '};  while(n! = 0) {s= S.append (b[n%16]); N= N/16; } A=s.reverse (). toString (); returnA; }}

Hehe ~ has been submitted, ok~

Let's take a look at StringBuffer

The addition of the string type is not very efficient, so this time it is necessary to consider the StringBuffer inside the Append () this method ~

OK, absolutely perfect ~

Java implementation decimal number to hexadecimal number