How can I convert a Char type to a Integer type?

[凯文]

I want this function:
receive a char: '3' by System.in.read();
and convert it to integer 3;
but I always get 51 now.
I know 51 is the ASCII for 3;
How can I convert char '3' to integer 3?

waiting online...

[googles]

int ii = Character.getNumericValue(ss);

[googles]

int ii = Character.getNumericValue(ss);

[xmvigour]

int ii = Character.getNumericValue(ss);

or

int ii =Integer.parseInt(String.valueOf(ss));

[凯文]

But compile failed!
prompt:
getNumericValue(char) in java.lang.Character cannot be applied to (int)

Why?

[tomxutomxu]

System.in.read()读出来的是char,当然会是ascii值了。
BufferedReader br = new BufferedReder(new OutputStreamReader(System.in)));
String theNum = br.readLine();
int num = Integer.parseInt(theNum);

[xmvigour]

johnwesley(我心荡漾(终于发现无界限)) :
can i view your code about this?

[凯文]

to: tomxutomxu(shprog).

compile prompt: cannot resolve symbol
symbol: class OutputStreamReader
location: class Test
BufferedReader br = new BufferedReader(new OutputStreamReader(System.in)); ^

[凯文]

To: xmvigour(微电)

import java.util.*;
import java.io.*;

public class Test{
public static void main(String[] args){
int i = 0;
try{
i = System.in.read();
System.out.println("Your input is:"+i);
}
catch(IOException e){}

System.out.println("Length will be:"+i);
}
}

[stupidball]

add import java.lang.*;

[xmvigour]

import java.util.*;
import java.io.*;

public class Test5{
public static void main(String[] args){
int i = 0;
char c;
int ii=0;
try{
i = System.in.read();
c=(char) i;
ii = Character.getNumericValue(c);
//ii =Integer.parseInt(String.valueOf(c));

System.out.println("Your input is:"+c+" ascii is "+i);
}
catch(IOException e){}

System.out.println("Length will be:"+ii);
}
}

[xmvigour]

johnwesley:
i = System.in.read();得到的是ascii码，所以你必须转换成char，再转存为int。

[凯文]

Yes you are right! Thank you!