Two methods for converting char to int in Java __java

Today, there was a problem with the machine test: How to turn char ' 9 ' to int 9, you should know that you can't convert directly, so you get the ASCII of ' 9 '. As below:

public class Intandcharconvertor {public
	static void Main (string[] args) {
		char NumChar = ' 9 ';
		int  intnum = (int) NumChar;
 		System.out.println (NumChar + ":" + Intnum);
	}

Run Result:

9:57

So how do you convert char ' 9 ' to int 9?

Method One: First convert char to char[1] array, then convert to string, and finally, using the Parserint method in integer, this method consumes a lot of memory to create multiple objects.

Method Two: Using the encapsulation class character of Char, it can be realized directly through the static method.

    public static int Getnumericvalue (CHAR-ch) {return
        getnumericvalue (int) ch);
    }

Example:

Package Com.albertshao.interview;

public class Intandcharconvertor {public
	static void Main (string[] args) {
		char NumChar = ' 9 ';
		int  intnum = (int) NumChar;
		System.out.println (NumChar + ":" + intnum);
		
		Method 1:
		char[] Chararray = {NumChar};
		Intnum = Integer.parseint (new String (Chararray));
		System.out.println ("Method 1:" + NumChar + ":" + intnum);
		
		Method 2:
		System.out.println ("Method 2:" + NumChar + ":" + character.getnumericvalue (NumChar));

		}
	

Run results

9:57 method
1:9:9 method
2:9:9