Constructor toGenericString() method in Java with Examples

The toGenericString() method of java.lang.reflect.Constructor class is used to return get the generic form of this constructor, i.e. a string representing the details about this constructor including the type parameters.

Syntax:

public String toGenericString()

Parameters: This method accepts nothing.

Return: This method returns a generic form of this constructor as a string that describes this Constructor along with the type parameters.

Below programs illustrate toGenericString() method:
Program 1:



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// Java program to illustrate
// toGenericString() method
  
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
  
public class GFG {
  
    public static void main(String[] args)
    {
        // create a class object
        Class classObj = shape.class;
  
        // get Constructor object
        // array from class object
        Constructor[] cons = classObj.getConstructors();
  
        // check get string representation
        String str = cons[0].toGenericString();
  
        // print result
        System.out.println("Constructor : " + str);
    }
  
    public class shape {
  
        public shape(Object... objects)
        {
        }
    }
}

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Output:

Constructor : public GFG$shape(GFG, java.lang.Object...)

Program 2:

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// Java program to illustrate
// toGenericString() method
  
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
  
public class GFG {
  
    public static void main(String[] args)
    {
        // create a class object
        Class classObj = String.class;
  
        // get Constructor object
        // array from class object
        Constructor[] cons
            = classObj.getConstructors();
  
        for (int i = 0; i < cons.length; i++) {
  
            String str = cons[i].toGenericString();
  
            // print result
            System.out.println(str);
        }
    }
}

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Output:

public java.lang.String(byte[], int, int)
public java.lang.String(byte[], java.nio.charset.Charset)
public java.lang.String(byte[], java.lang.String) throws java.io.UnsupportedEncodingException
public java.lang.String(byte[], int, int, java.nio.charset.Charset)
public java.lang.String(byte[], int, int, java.lang.String) throws java.io.UnsupportedEncodingException
public java.lang.String(java.lang.StringBuilder)
public java.lang.String(java.lang.StringBuffer)
public java.lang.String(byte[])
public java.lang.String(int[], int, int)
public java.lang.String()
public java.lang.String(char[])
public java.lang.String(java.lang.String)
public java.lang.String(char[], int, int)
public java.lang.String(byte[], int)
public java.lang.String(byte[], int, int, int)

References: https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Constructor.html#toGenericString()

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