本文介绍了一种将数字转换为字母的Java方法实现。该方法可以处理小于等于26的数字直接转换成对应的单个字母，对于大于26的数字则通过除法和取余操作来生成两个字母的组合。
String[] str = new string[]{"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"};
public String numToLetter(int num){
if(num>=26){
return str[num/26-1]+str[num%26];
} else {
return str[num];
}
}
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