Use of valueOf() method

The valueOf() method is used to return the native Number object value of the given parameter. The parameter can be a native data type, String, etc.

This method is a static method. This method can receive two parameters, one is a string and the other is the base.

This method has the following syntax formats:

static Integer valueOf(int i)
static Integer valueOf(String s)
static Integer valueOf(String s, int radix)

Parameters

i -- The integer of the Integer object.

s -- String of Integer objects.

radix --The radix used when parsing the string s, used to specify the base number used.

Return value

Integer valueOf(int i): Returns an Integer instance representing the specified int value.

Integer valueOf(String s): Returns an Integer object that holds the value of the specified String.

Integer valueOf(String s, int radix): Returns an Integer object that holds the value extracted from the specified String when parsed with the radix provided by the second parameter.

Example

public class Test{ 
public static void main(String args[]){
        Integer x =Integer.valueOf(9);
        Double c = Double.valueOf(5);
        Float a = Float.valueOf("80");               
        Integer b = Integer.valueOf("444",16);   // 使用 16 进制
        System.out.println(x); 
        System.out.println(c);
        System.out.println(a);
        System.out.println(b);
    }
}

Compile the above program and the output result is:

9
5.0
80.0
1092

Related recommendations: "Java Tutorial"

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