为什么输入信息后没有输出

public class Myproject {
public static void main(String[] args) {
Scanner in=new Scanner(System.in);
System.out.print("请输入您的姓名，性别，年龄，java成绩：");
String nname=in.nextLine();
String nsex=in.nextLine();
int nage=in.nextInt();
float nscore=in.nextFloat();
Student stu=new Student();
stu.name=nname;
stu.sex=nsex;
stu.age=nage;
stu.score=nscore;
stu.speak("年龄："+stu.age+"岁;");
stu.grade(stu.score);
}
}
class Student{
String name;
String sex;
int age;
float score;
public void speak(String inStr){
System.out.print("自我介绍：我叫"+name+";"+"性别："+sex+";"+inStr);//可以加其他语句
}
public void grade(float inScore){
System.out.println("java成绩："+inScore);
}
}