Java 代码不打印 HashMap 的键和值

Question

我的代码输入了一个用户定义的字符串并将其分类为 DNA、RNA 或 ODD。输出应该打印 HashMap nucleotide_hmap 的键和值，但代码目前没有。我应该在我的代码中更改什么才能使其正常工作？

代码应输出以下内容：（如果用户输入序列 ATGC）

ATGC
A 1 : 0.25
T 1 : 0.25
C 1 : 0.25
G 1 : 0.25
序列长度：4
逆序：CGTA
反补：GCAT

这是我的子类之一：

package sequenceclasses; 

public class DNASequence extends MainSequence {
    public DNASequence(String dna_sequence){
        the_sequence = dna_sequence; 
        complement_hmap.put('A', 'T');
        complement_hmap.put('T', 'A');
        complement_hmap.put('C', 'G');
        complement_hmap.put('G', 'C');
    }   
    public void nuc_content(String dna_sequence){
        the_sequence = dna_sequence;
        double[] counts_ratios = new double[8];
        for (int i = 0; i < dna_sequence.length(); i++){
            if (dna_sequence.charAt(i) == 'A'){
                counts_ratios[0] += 1;}
            if (dna_sequence.charAt(i) == 'T'){
                counts_ratios[1] += 1;}
            if (dna_sequence.charAt(i) == 'C'){
                counts_ratios[2] += 1;}
            if (dna_sequence.charAt(i) == 'G'){
                counts_ratios[3] += 1;}
            }
            if (dna_sequence.length() > 0){
                counts_ratios[4] = counts_ratios[0] / dna_sequence.length();
                counts_ratios[5] = counts_ratios[1] / dna_sequence.length();
                counts_ratios[6] = counts_ratios[2] / dna_sequence.length();
                counts_ratios[7] = counts_ratios[3] / dna_sequence.length();
        }       
        String A_content = Double.toString(counts_ratios[0]) + " , " + Double.toString(counts_ratios[4]);
        String T_content = Double.toString(counts_ratios[1]) + " , " + Double.toString(counts_ratios[5]); 
        String C_content = Double.toString(counts_ratios[2]) + " , " + Double.toString(counts_ratios[6]);
        String G_content = Double.toString(counts_ratios[3]) + " , " + Double.toString(counts_ratios[7]);

        nucleotide_hmap.put('A', A_content);
        nucleotide_hmap.put('T', T_content);
        nucleotide_hmap.put('C', C_content);
        nucleotide_hmap.put('G', G_content);
    }
}

Answer 1

您永远不会在 DNASequence class 中调用 nuc_content 方法。要解决此问题，请将行 nuc_content(dna_sequence); 添加到 DNASequence class。构造函数现在应该如下所示：

public DNASequence(String dna_sequence){
        the_sequence = dna_sequence; 
        complement_hmap.put('A', 'T');
        complement_hmap.put('T', 'A');
        complement_hmap.put('C', 'G');
        complement_hmap.put('G', 'C');
        nuc_content(dna_sequence);
    }

Java 代码不打印 HashMap 的键和值

Java Code not printing Keys and Values of HashMap

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