我收到一个奇怪的数字格式异常。我知道如果在我尝试创建一个新的 Integer 包装器对象时出现奇怪的字符，它将无法工作，但我的输入字符串似乎是普通的数字字符串。是否有其他原因导致我出现此错误？
systemtest:
[junit] Running simpledb.systemtest.ScanTest
[junit] Testsuite: simpledb.systemtest.ScanTest
[junit] Tests run: 3, Failures: 0, Errors: 3, Time elapsed: 0.097 sec
[junit] Tests run: 3, Failures: 0, Errors: 3, Time elapsed: 0.097 sec
[junit]
[junit] Testcase: testSmall took 0.025 sec
[junit] Caused an ERROR
[junit] For input string: "4386131530"
[junit] java.lang.NumberFormatException: For input string: "4386131530"
[junit] at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
[junit] at java.lang.Integer.parseInt(Integer.java:484)
[junit] at java.lang.Integer.parseInt(Integer.java:514)
[junit] at simpledb.HeapPageId.hashCode(HeapPageId.java:44)
...
[junit] Testcase: testCache took 0.029 sec
[junit] Caused an ERROR
[junit] For input string: "8140111260"
[junit] java.lang.NumberFormatException: For input string: "8140111260"
[junit] at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
[junit] at java.lang.Integer.parseInt(Integer.java:484)
[junit] at java.lang.Integer.parseInt(Integer.java:514)
[junit] at simpledb.HeapPageId.hashCode(HeapPageId.java:44)
[junit] at simpledb.BufferPool.getPage(BufferPool.java:70)
[junit] at simpledb.HeapFile$HFTupleIterator.retrieveTuples(HeapFile.java:200)
[junit] at simpledb.HeapFile$HFTupleIterator.open(HeapFile.java:141)
[junit] at simpledb.SeqScan.open(SeqScan.java:92)
[junit] at simpledb.systemtest.SystemTestUtil.matchTuples(SystemTestUtil.java:121)
[junit] at simpledb.systemtest.SystemTestUtil.matchTuples(SystemTestUtil.java:107)
[junit] at simpledb.systemtest.SystemTestUtil.matchTuples(SystemTestUtil.java:100)
[junit] at simpledb.systemtest.ScanTest.testCache(ScanTest.java:99)
[junit]
最佳答案
您的数字太大，无法放入整型变量中。但是，这种大小的整数适合 long。将声明更改为 long(或者可能是 BigDecimal)，或者使用更小的数字 <= Integer.MAX_VALUE;
关于java - 数字字符串上的奇怪错误 : NumberFormatException，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19020181/