如何检查int是否为小数？ [重复]

This question already has an answer here:

这个问题在这里已有答案:

• How to check if number is a decimal? 3 answers

如何检查数字是否为小数? 3个答案

• How to test if a double is an integer 12 answers

如何测试double是一个整数12个答案

I need help with something that can help me check if an int is a decimal. Something like:

我需要帮助,以帮助我检查int是否为小数。就像是:

if(variable == decimal){ //assuming the variable was entered by a user
    System.out.println("This number is a decimal.");
} else 
    System.out.println("This number is an integer.");
}

1 个解决方案

#1

If your "variable" value is a double then :

如果您的“变量”值是双倍,那么:

return Math.floor(variable) == variable;

Will return true if "variable" is an Integer.

如果“variable”是Integer,则返回true。