public class RandomStr{
public static void String (String[] args)
{
String result = "";
for (int i = 0; i<6; i++)
{
int intVal = (int)(Math.random()*26+97);
result = result +(char) intVal;
}
System.out.println(result);
}
}
Math.random是[0.0,1.0),大于等于0但是小于1的浮点数值
0-9 .48-57
A-Z 65-90
a-z 97-122