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Java ThreadGroup toString() method with example

ThreadGroup Class toString() method: Here, we are going to learn about the toString() method of ThreadGroup Class with its syntax and example.
Submitted by Preeti Jain, on December 24, 2019

ThreadGroup Class toString() method

• toString() method is available in java.lang package.
• toString() method is used to returns string denotation of this thread group (i.e. this method returns how to represent a string of this ThreadGroup).
• toString() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• toString() method may throw an exception at the time of string denotation of this ThreadGroup.
  SecurityException – This exception may throw when the current thread is not permitted to update this Thread group.

Syntax:

    public String toString();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of this method is String – it denotes string of this thread group.

Example:

// Java program to demonstrate the example 
// of String toString() method of ThreadGroup 

public class toString {
    public static void main(String[] args) {
        ThreadGroup th_grp1 = new ThreadGroup("th_grp - 1");
        ThreadGroup th_grp2 = new ThreadGroup("th_grp - 2");

        // By using getName() method is to display
        // thread group name
        System.out.println("th_grp1.getName(): " + th_grp1.getName());
        System.out.println("th_grp2.getName(): " + th_grp2.getName());

        // By using toString() method is to string
        // representation of thread group 
        System.out.println("th_grp1.toString(): " + th_grp1.toString());
        System.out.println("th_grp2.toString(): " + th_grp2.toString());
    }
}

Output

th_grp1.getName(): th_grp - 1
th_grp2.getName(): th_grp - 2
th_grp1.toString(): java.lang.ThreadGroup[name=th_grp - 1,maxpri=10]
th_grp2.toString(): java.lang.ThreadGroup[name=th_grp - 2,maxpri=10]