Java中的整数

Question

我试图四舍五入一些双小数，因为我得到的只有0.0作为除法的结果。我尝试使用BigDecimal方式和String.format()，但我仍然得到0.00:相关芳香族/脂肪族:000杂环类/脂肪族:000杂环化合物/芳香族:0,000

我怎么能解决这个问题??这些值应该是:关系型芳烃/脂肪族:0,14杂环与脂肪族的关系:0,12杂环/芳香族:0.875

这是代码:

进口java.io.InputStream;import java.net.URL;import java.util.Set;

import org.biojava.nbio.core.sequence.ProteinSequence;import org.biojava.nbio.core.sequence.compound.AminoAcidCompound;import org.biojava.nbio.core.sequence.io.FastaReaderHelper;

public class BioSeq {ProteinSequence seq = getSequenceForId ("P31574");

int polarCount = numberOfOccurrences(seq, new HashSet<>(Arrays.asList("Y", "S", "T", "N", "Q", "C","H","R","D","E","K")));
double polar = ((double)(polarCount));

int NonPolarCount = numberOfOccurrences(seq, new HashSet<>(Arrays.asList("A","V","L","G","I","M","W","P","F")));
double NonPolar = ((double)(NonPolarCount));

int Aromatic = numberOfOccurrences(seq, new HashSet<>(Arrays.asList("W","Y","F","H")));
double AromaticCount = ((double)(Aromatic));

int Aliphatic = numberOfOccurrences(seq, new HashSet<>(Arrays.asList("A","V","L","I","P","G","R")));
double AliphaticCount = ((double)(Aliphatic));

int Heterocyclics = numberOfOccurrences(seq, new HashSet<>(Arrays.asList("W","H","P")));
double HeteroCount = ((double)(Heterocyclics));

double rel_polarity = (polar/NonPolar); 
double rel_arom = (Aromatic/Aliphatic);         
double rel_alip = (Heterocyclics/Aliphatic);    
double rel_hetero = (Heterocyclics/Aromatic);   


System.out.println("Полярные АМК: " + polar);
System.out.println("Неполярные АМК: " + NonPolar);
System.out.println("Ароматичесие АМК: " + AromaticCount);
System.out.println("Алифатические АМК: " + AliphaticCount);
System.out.println("Гетероциклические АМК: " + HeteroCount);
System.out.println("_______________________");
System.out.println("Relations and Percentages: ");

System.out.println("Relation Polar/No polars: " + String.format("%.2f",rel_polarity));
System.out.println("Relation Aromatics/Aliphatics: " + String.format("%.2f",rel_arom));
System.out.println("Relation Heterocyclics/Aliphatics: " + String.format("%.2f",rel_alip));
System.out.println("Relation Heterocyclics/Aromatic: " + String.format("%.2f",rel_hetero));
try {
System.out.println(getSequenceForId("P31574"));
} catch (Exception e) {
e.printStackTrace();
}
}
private static int numberOfOccurrences(ProteinSequence seq, Set<String> bases) {
int count = 0;
for (AminoAcidCompound aminoAcid : seq)
if(bases.contains(aminoAcid.getBase()))
count++;
return count;
}}

Answer 1

double rel_polarity = ((double)polar/(double)NonPolar)*100;

double rel_arom = ((double)Aromatic/(double)Aliphatic)*100;

double rel_alip = ((double) heterocyics/(double)Aliphatic)*100;

double rel_hetero = ((double) heterocyics/(double)Aromatic)*100;