無法在方法中創建其他實例引用

Question

我正在Eclipse中製作一個計算器程序作爲excersize。我收到很多錯誤。我想要做的是改變兩個引用this和dec的「名稱」，以使該代碼稍後在該方法中更清晰。問題是什麼？

public Decimals plus(Decimals dec) { 
    //let's get the length of the 2 numbers 
    int this_len=this.getLength(), dec_len=dec.getLength(); 
    int longest_len; 
    //to simplify the code the two numbers are called long or short 
    Decimals short; //shortest <-- Syntax error on token 'short', ++ expected/Decimals cannot be resolved to a variable 
    Decimals long; //longest <-- Syntax error on token 'long', ++ expected/Decimals cannot be resolved to a variable 
    if (this_len >= dec_len){ 
     short = dec; // <-- Syntax error on token "=", delete this token/Duplicate local variable dec 
     long = this; // <-- Syntax error on token "long", invalid Expression 
     longest_len = this_len; 
    } 
    else { 
     short = this; // <-- Syntax error on token "short", VariableDeclaratorId expected after this token 
     long = dec; // <-- Syntax error on token "long", invalid Expression 
     longest_len = dec_len; 
    } 

Answer 1

short和long是關鍵字。您不能將它們用作變量名稱。 shortest和longest會很好。