JAVA常见问题解决办法汇总

1.java.lang.NullPointerException        缘由是：有空指针，有地址没赋值 2.Exception in thread "main" java.lang.ArithmeticException: / by zero       缘由是除数是0 3.ArrayIndexOutOfBoundsException         缘由是：数组越界 4.java.lan

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