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View Compilation Error

0_0_29158428_19588\Main.java:34: 错误: 找不到符号
            Arrays.sort(ps, new Comparator<point>() {
                                           ^
  符号:   类 point
  位置: 类 Main
0_0_29158428_19588\Main.java:76: 错误: 找不到符号
        ArrayList<point> nearPoints = new ArrayList<>();
                  ^
  符号:   类 point
  位置: 类 Main
0_0_29158428_19588\Main.java:84: 错误: 找不到符号
        Collections.sort(nearPoints, new Comparator<point>() {
                                                    ^
  符号:   类 point
  位置: 类 Main
3 个错误


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