java runtime_error ai_generated true

java.lang.ArithmeticException: / by zero

ID: java/arithmeticexception-divide-by-zero

Also available as: JSON · Markdown · 中文
95%Fix Rate
90%Confidence
1Evidence
2023-05-12First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Java 8 active — — —
Java 11 active — — —
Java 17 active — — —
Java 21 active — — —

Root Cause

Integer division or modulo operation with a zero divisor, which is undefined in integer arithmetic.

generic

中文

整数除法或取模运算的除数为零，这在整数算术中未定义。

Official Documentation

https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/ArithmeticException.html

Workarounds

  1. 95% success Check divisor before division: 'if (divisor == 0) { throw new IllegalArgumentException("Division by zero"); } else { result = dividend / divisor; }' 
    Check divisor before division: 'if (divisor == 0) { throw new IllegalArgumentException("Division by zero"); } else { result = dividend / divisor; }'
  2. 85% success Use a safe division utility: 'public static int safeDivide(int a, int b) { if (b == 0) return 0; return a / b; }' 
    Use a safe division utility: 'public static int safeDivide(int a, int b) { if (b == 0) return 0; return a / b; }'

中文步骤

  1. Check divisor before division: 'if (divisor == 0) { throw new IllegalArgumentException("Division by zero"); } else { result = dividend / divisor; }'
  2. Use a safe division utility: 'public static int safeDivide(int a, int b) { if (b == 0) return 0; return a / b; }'

Dead Ends

Common approaches that don't work:

  1. 75% fail

    Using floating-point division (e.g., double) instead of integer division avoids the exception but may produce Infinity or NaN, which can propagate silently.

  2. 80% fail

    Simply catching the exception and logging it without fixing the divisor can cause the application to produce incorrect results.