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(1)写一个程序,用于分析一个字符串中各个单词出现的频率,并将单词和它出现的频率输出显示。(单词之间用空格隔开,如“Hello World My First Unit Test”);
(2)编写单元测试进行测试;
(3)用ElcEmma查看代码覆盖率,要求覆盖达到100%。
package com.kai.demo;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Test2 {
private Map<String, Integer> wordsMap;
public Test2(String strWords) {
wordsMap = this.getArray(strWords);
}
public Map<String, Integer> getArray(String strWords) {
String[] words_Array = strWords.split("");
Map<String, Integer> words_Map = new HashMap<String, Integer>();
int arrlength = words_Array.length;
for (int i = 0; i < arrlength; i++) {
if (!words_Map.containsKey(words_Array[i])) {
words_Map.put(words_Array[i], 1);
} else {
int currentNum = words_Map.get(words_Array[i]) + 1;
words_Map.remove(words_Array[i]);
words_Map.put(words_Array[i], currentNum);
}
}
return words_Map;
}
public void OutputResult() {
Set s = wordsMap.keySet();
Iterator i = s.iterator();
while (i.hasNext()) {
Object o = i.next();
System.out.println(o + "出现了" + wordsMap.get(o)+"次");
}
}
}
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原文地址:http://www.cnblogs.com/cy5201314/p/5327396.html