回答編集履歴
1
代入文の右辺を追記
test
CHANGED
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@@ -2,7 +2,7 @@
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2
2
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3
3
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4
4
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5
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-
`ArrayList teacher;`
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5
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+
`ArrayList teacher = new ArrayList();`
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6
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7
7
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8
8
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@@ -38,7 +38,7 @@
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38
38
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39
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41
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-
`ArrayList<Teacher> teachers;`
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41
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+
`ArrayList<Teacher> teachers = new ArrayList<>();`
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42
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43
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