AIRecomandationTest from niuke test .com bitscountint型正整数在内存中存储时1的个数& positive int num to binarybits

package com.microsoft.aiRecmandation;

import java.util.ArrayList;

import java.util.List;

public class AIRecomandationTestController {

public static void main(String[] args) {

System.out.println("Hello World!");

}

// from niuke test .com bitscount

/**

* int型正整数在内存中存储时1的个数

* @param srcInt

* @return

*/

public static Integer getBinaryNumCnt(Integer srcInt){

if (srcInt==null){

return null;

}

List<Integer> integerArrayList = new ArrayList<>();

while (true){

int modeRet=srcInt % 2;

integerArrayList.add(modeRet);

srcInt /= 2;

if (srcInt==0){

break;

}

}

List<Integer> arrayList = new ArrayList<>();

integerArrayList.forEach(e->{

if (e==1){

arrayList.add(e);

}

});

return arrayList.size();

}

// positive int num to binarybits

public static String BigDecimal2BinaryBits(int bigDecimalInt) {

if(bigDecimalInt<0) {

return null;

}

// 2to0 2to1 2to2 2to3 1 2 4 8 decimal number represention

// 10=1+2+4+3(1+2 00010010000000 decimal 3=2+1) 00000110000000000000000000 decimal = 1+2+4+(1+2)->7+3=10

// bits2BigDecimal 2to0+2to2 (1+2) 4 +

StringBuilder strBuilder=new StringBuilder();

int count=0;

while(true) {

int overBits=bigDecimalInt/2;

int overBitLessBits=overBits%2;

// over bits less come to end break this roopS

strBuilder.add();

if(overBitLessBits==count) {

break;

}

count++;

}

return strBuilder.toString();

}

}

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