Record a list object traversal and determine the size of the float type

1. about float Numerical comparison of types , To avoid loss of accuracy

BigDecimal class 

Self encapsulated tool class

package OPCutils;

import java.math.BigDecimal;

public class We {
    public int floatCompare(float a, float b) {
        BigDecimal bd1 = BigDecimal.valueOf(a);
        BigDecimal bd2 = BigDecimal.valueOf(b);
        return bd1.compareTo(bd2);
    }

}

Concrete realization

 public void zongceshi(){
        OpcSOS opcSOS=new OpcSOS();
        List<String> list = opcSOS.luxun();
        We we = new We();
        List<PlcdataDO> plclist=new ArrayList<>();
        for (int i = 0; i < list.size(); i++) {
            PlcdataDO plcdataDOS = plcdataDao.selectSub(list.get(i));
            plclist.add(plcdataDOS);
        }
        List<PlcdataDO> plclist1=new ArrayList<>();
        for (PlcdataDO plcdataDO:plclist){
            int i = we.floatCompa