Java 函数开发中常见的异常类型及其修复措施
在 Java 函数开发过程中,可能遇到各种异常,影响函数的正确执行。以下是常见的异常类型及其修复措施:
1. NullPointerException
示例代码:
try { String name = null; System.out.println(name.length()); } catch (NullPointerException e) { System.out.println("Name is null, cannot access length."); }
2. IndexOutOfBoundsException
示例代码:
int[] numbers = {1, 2, 3}; try { System.out.println(numbers[3]); } catch (IndexOutOfBoundsException e) { System.out.println("Index 3 is out of bounds for the array."); }
3. NumberFormatException
示例代码:
String numberString = "abc"; try { int number = Integer.parseInt(numberString); } catch (NumberFormatException e) { System.out.println("Could not parse '" + numberString + "' into an integer."); }
4. IllegalArgumentException
示例代码:
public void doSomething(int index) { if (index < 0) { throw new IllegalArgumentException("Index cannot be negative."); } // ... }
5. StackOverflowError
示例代码:
public void doRecursion(int depth) { if (depth == 0) { return; } doRecursion(--depth); }
通过了解和修复这些常见的异常,您可以提高 Java 函数的健壮性和可靠性。
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