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#. Priority Queue Using Costom Class

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class Gillog implements Comparable<Gillog> {\n\n    private int writeRowNumber;\n    private String content;\n\n    public Gillog(int writeRowNumber, String content) {\n        this.writeRowNumber = writeRowNumber;\n        this.content = content;\n    }\n\n    public int getWriteRowNumber() {\n        return this.writeRowNumber;\n    }\n\n    public String getContent() {\n        return this.content;\n    }\n\n    @Override\n    public int compareTo(Gillog gillog) {\n\n        if (this.writeRowNumber > gillog.getWriteRowNumber())\n            return 1;\n        else if (this.writeRowNumber < gillog.getWriteRowNumber())\n            return -1;\n        return 0;\n    }\n}
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#. Priority Queue에 적용

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public static void main(String[] args) {\n\n        PriorityQueue<Gillog> priorityQueue = new PriorityQueue<>();\n\n        priorityQueue.add(new Gillog(3650, \"10년후 글\"));\n        priorityQueue.add(new Gillog(31, \"한달 후 글\"));\n        priorityQueue.add(new Gillog(1, \"첫번째 글\"));\n        priorityQueue.add(new Gillog(365, \"1년후 글\"));\n\n        while (!priorityQueue.isEmpty()) {\n        Gillog gilLog = priorityQueue.poll();\n        System.out.println(\"글 넘버 : \" + gilLog.getWriteRowNumber() + \" 글 내용 : \" + gilLog.getContent());\n        }\n        }\n    \n /* 실행 결과\n글 넘버 : 1 글 내용 : 첫번째 글\n글 넘버 : 31 글 내용 : 한달 후 글\n글 넘버 : 365 글 내용 : 1년후 글\n글 넘버 : 3650 글 내용 : 10년후 글\n */
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