Java 函數開發中常見的例外類型及其修復措施
在Java 函數開發過程中,可能會遇到各種異常,影響函數的正確執行。以下是常見的例外類型及其修復措施:
1. NullPointerException
範例程式碼:
try { String name = null; System.out.println(name.length()); } catch (NullPointerException e) { System.out.println("Name is null, cannot access length."); }
2. IndexOutOfBoundsException
範例程式碼:
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
範例程式碼:
String numberString = "abc"; try { int number = Integer.parseInt(numberString); } catch (NumberFormatException e) { System.out.println("Could not parse '" + numberString + "' into an integer."); }
4. IllegalArgumentException
public void doSomething(int index) {
if (index < 0) {
throw new IllegalArgumentException("Index cannot be negative.");
}
// ...
}
##描述:
public void doRecursion(int depth) { if (depth == 0) { return; } doRecursion(--depth); }
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