System.out.println(a1.getClass() == a4.getClass());
报错:Incompatible operand types Class<capture#3-of ? extends int[]> and Class<capture#4-of ? extends String[]>
System.out.println(a1.getClass() == a3.getClass());
报错:Incompatible operand types Class<capture#5-of ? extends int[]> and Class<capture#6-of ? extends int[][]>
这两个类型都不匹配啊,不能比较
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