Constructor toString() method in Java with Examples
Last Updated :
29 Oct, 2019
The toString() method of java.lang.reflect.Constructor class is used to return string representation of this Constructor.This string is the collection of all the properties of this constructor. For creating this string method adds access modifiers of the constructor with the name of the declaring class of constructor then add parenthesized and add a comma-separated list of the constructor’s formal parameter types together.
Syntax:
public String toString()
Parameters: This method accepts nothing.
Return: This method returns string describing this Constructor.
Below programs illustrate toString() method:
Program 1:
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
public class GFG {
public static void main(String[] args)
{
Class classObj = shape. class ;
Constructor[] cons = classObj.getConstructors();
String str = cons[ 0 ].toString();
System.out.println( "Constructor : " + str);
}
public class shape {
public shape(Object... objects)
{
}
}
}
|
Output:
Constructor : public GFG$shape(GFG, java.lang.Object[])
Program 2:
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
public class GFG {
public static void main(String[] args)
{
Class classObj = String. class ;
Constructor[] cons = classObj.getConstructors();
for ( int i = 0 ; i < cons.length; i++) {
String str = cons[i].toString();
System.out.println(str);
}
}
}
|
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#toString()
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