如何解决用Java中的特定数字值替换给定字母
我想将一个字母作为字符串传递给这个方法,它应该返回存储在与 letterdispari 数组相同的索引中但在 numberdispari 数组中的相应数字(作为字符串)。 我认为使用字符串比创建一个巨大的 switch 语句更容易。但我不明白为什么这没有返回任何东西。
private static String toNumberdispari2(String letter) {
String result= "";
String[] letterdispari = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"};
String[] numberdispari = {"1","0","13","15","17","19","21","18","20","11","12","14","16","10","22","25","24","23"};
for(int i=0; i<=35; i++) {
if (letter != letterdispari[i])
continue;
else if (letter == letterdispari[i])
result = numberdispari[i];
}
return result;
}
解决方法
String 是一个 Java 对象。您不能使用“=”运算符来检查两个不同的 String 对象是否具有相同的值。 "=" 检查对象引用,在这种情况下会有所不同。您需要使用以下代码进行值比较。
for(int i=0; i<=35; i++) {
if (!letter.equals(letterDispari[i]))
continue;
else if (letter.equals(letterDispari[i]))
result = numberDispari[i];
}
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