rl544
39 lines
1.3 KiB
Java
39 lines
1.3 KiB
Java
// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/42888
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import java.util.HashMap;
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import java.lang.StringBuilder;
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import java.util.ArrayList;
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class Solution {
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public String[] solution(String[] record) {
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HashMap<String,String> hm = new HashMap<>();
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ArrayList<String> al = new ArrayList<>(), al2 = new ArrayList<>();
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StringBuilder sb = new StringBuilder();
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for(String r : record){
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String[] temp = r.split(" ");
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String job = temp[0], uid = temp[1], name = "", msg="";
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if(temp.length==3) {
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name = temp[2];
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hm.put(uid,name);
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}
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switch(job){
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case "Enter":
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msg = "님이 들어왔습니다.";
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break;
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case "Leave":
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msg = "님이 나갔습니다.";
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break;
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}
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if(!msg.equals("")) {
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al.add(uid);
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al2.add(msg);
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}
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}
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for(int a = 0; a < al.size(); a++){
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sb.append(hm.get(al.get(a)));
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sb.append(al2.get(a));
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al.set(a,sb.toString());
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sb.setLength(0);
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}
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return al.toArray(String[]::new);
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}
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} |