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我有一個方法來計算字符串的頻率,並記錄數組中記錄2個參數(freq和char)的字符的頻率。這是代碼:線程「main」中的異常java.lang.ArrayIndexOutOfBoundsException:-33
該錯誤是在該特定行:
this.frequencies並[c - 'A'] =新CharFrequency280(」」,0);
private void countFrequencies() {
//TODO
// Initialize the frequency of each possible character to zero.
for (int a=0; a<message.length(); a++){
char c = message.charAt(a);
c = Character.toUpperCase(c);
this.frequencies[c - 'A' ] = new CharFrequency280(' ', 0);
}
// Count the frequency of each character.
for (int a=0; a<message.length(); a++){
char c = message.charAt(a);
c = Character.toUpperCase(c);
this.frequencies[c - 'A'].incrementFreq();
}
}
這絕對不是JavaScript。 – Bergi
是'this.frequencies'某種數組或列表,因爲您試圖在可能不存在的元素內創建一個'CharFrequency280'。 – Sebastien