Question

public Object Convert(Class<T> Type) {
    if (Type == Integer.class) {
        return Integer.parseInt(DataInfo);
    } else if (Type == String.class ) {
        return DataInfo;
    } else if (Type == Double.class) {
        return Double.parseDouble(DataInfo);
    }
    return null;

}

Is there any other way that I can do this?

I just want to do something like: int X = Foo.Convert<int>();

Where it takes a string and converts it to <Type> <—– That. I tried:

public T Convert()
{
}

But I searched everywhere and Java doesn’t have a typeof function :S Basically trying to convert a string from the user to a data type.

EDIT.. I’m asking because in C++ I usually do:

template <typename T>
inline T ToNumber(const std::string &Text){std::istringstream SS(Text); T Result; return (SS >> Result ? Result : 0);}

I wanted to know if in Java I can do that.. I was using it like:

package test;

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

public class Data<T> {
    private String DataInfo;

    public String ReadBuffer() throws IOException {
        BufferedReader Buffer = new BufferedReader(new InputStreamReader(System.in));
        return (DataInfo = Buffer.readLine());
    }

    public String ReadConsole() {
        Console Con = System.console();
        return (DataInfo = Con.readLine());
    }

    public String Read() {
        Scanner Reader = new Scanner(System.in);
        return (DataInfo = Reader.next());
    }

    public Object Convert(Class<T> Type) {
        if (Type == Integer.class) {
            return Integer.parseInt(DataInfo);
        } else if (Type == String.class ) {
            return DataInfo;
        } else if (Type == Double.class) {
            return Double.parseDouble(DataInfo);
        }
        return null;

    }
}

Answer 1

Due to type erasure, that is completely impossible.

The best you can do it have the caller pass a Class<T>.