Test.java:15: 错误: 需要';' this r = r; ^ Test.java:16: 错误: 不是语句 this pai = pai;

import java.util.;
class yuanzhu
{
float r;
float pai = (float) 3.14;
float h = h;
yuanzhu ()
{
r=2.5;
pai=3.14;
h=4.1;
}
yuanzhu( float r, float pai)
{
this r = r;
this pai = pai;
}
yuanzhu(float r, float pai,float h)
{
this(r,pai);
this h = h;
}
float getmianji()
{
return pairr;
}
double gettiji()
{
return pairrh;
}
double getyuanzhuitiji()
{
return 1/3pairrh;
}
double getqiutiji()
{
return 4/3pairrr;
}
}
public class Test
{
public static void main (String args[])
{
yuanzhu yuan1=new yuanzhu();
System.out.println("请输入圆柱的半径："+yuan1.r);
System.out.println("请输入圆柱的高："+yuan1.h);
System.out.println("圆柱的体积："+yuan1.gettiji());
System.out.println("圆椎的体积："+yuan1.getyuanzhuitiji());
System.out.println("球的体积："+yuan1.getqiutiji());
Scanner scanner = new Scanner(System.in);
float r=scanner.nextFloat();
float h=scanner.nextFloat();
}
}

符号错了“ ； ”，不是中式是英式的;

this r = r 这一行少一个点
this.r = r