When programming a software solution, the developers create several user-defined classes that implement the code for their software solution. To assist the developers, all languages provide standard libraries that are sub-divided into packages. These packages may have built-in interfaces, classes, and methods. The classes and methods usually have pre-defined functionality that reduces the developers' workload while expanding the language's capabilities. <\/p>\n\n\n\n
Java also has a lot of standard libraries with packages that have a collection of user interfaces, classes, and methods. The classes in a package provide solutions within a common domain. For example, the java.applet has classes and methods to be used for applets, and the java.io has classes and methods for system input and output through data streams, and so on.<\/p>\n\n\n\n
\n Java Programming Course<\/a>\n <\/p>\n Learn Java the right way! Our course teaches you essential programming skills, from coding basics to complex projects, setting you up for success in the tech industry.<\/p>\n The toString method is a built-in method in the Object class in java. Object class is present in java.lang package, and it\u2019s the parent class of all classes. Every class in Java inherits the default implementation of the toString method. <\/p>\n\n\n\n Functionality and Return Values of toString method<\/strong><\/p>\n\n\n\n The functionality of the toString method is to return a String representation of the object on which it\u2019s called. The method describes the object in String or converts a numeric value into a String. <\/p>\n\n\n\n Parameters and Syntax<\/strong> String toString()<\/strong><\/p>\n\n\n\n The above form shows that the return type of the method is String. The method can also be used with objects and other data types, as shown below.<\/p>\n\n\n\n Another variation of the method accepts 2 arguments - a number and the base in which the number\u2019s String representation is required. An example is shown in the next section to see how this works. Its syntax is: <\/p>\n\n\n\n The below examples show how the toString method can be used.<\/p>\n\n\n\n Example 1:<\/em><\/strong><\/p>\n\n\n\n For example1, Player@7a81197d is printed to the console. Since \u2018player\u2019 is an object, the toString method\u2019s default implementation gives a String that describes the class name + \u2018@\u2019+ hashcode value of the object on which the method is called.<\/p>\n\n\n\n When the toString method is not used explicitly in the println statement, it gets called by default, and println outputs the String representation of the object. Let\u2019s try that in our example:<\/p>\n\n\n\n Example2:<\/em><\/strong><\/p>\n\n\n\n The output is Player@7a81197d<\/strong>. <\/p>\n\n\n\n The result is the same as in the previous example, showing that the toString method is called by default when println outputs an object. In both the cases above, the result doesn\u2019t serve any purpose, so we will override the default toString method and change how it works. <\/p>\n\n\n\n Example3:<\/em><\/strong><\/p>\n\n\n\n The result of the above examples is:<\/p>\n\n\n\n Player{name=Messi,Jersey=10,Club=Paris Saint-Germain}<\/strong><\/p>\n\n\n\n As seen in the above code, the toString method has code that overrides the default implementation. When toString is called in the println statement, the new code of the toString method returns a value that gets printed. Even if the toString method is not called explicitly in println, it gets called by default, and the same output gets printed.<\/p>\n\n\n\n The below example shows how the toString method can be used on an integer whose String value is required in a different base. Here 2400 is converted into base 8, and the String value is displayed.<\/p>\n\n\n\n Example 4:<\/strong><\/p>\n\n\n\n The output of the above code is 4540. <\/strong><\/p>\n\n\n\n The toString method is in the Object class, the parent class in java, so it\u2019s available in every class in java by default. The method can be used on any object required to be represented in a String format. This can help debug when you need the details of an object. Sometimes you may want to override the method to implement it the way you want. Either way, it\u2019s advantageous when you are programming in Java.<\/p>\n\n\n\n Engaging in the study of Java programming suggests a keen interest in the realm of software development. For those embarking upon this journey with aspirations towards a career in this field, it is recommended to explore the following pages in order to acquire a comprehensive understanding of the development career path:<\/p>\n\n\n\nWhat is toString?<\/strong><\/h2>\n\n\n\n
<\/strong>The generic form of the method is given below. <\/p>\n\n\n\nstatic String toString(float num)\nstatic String toString(double num)\nstatic String toString(byte num)\nstatic String toString(boolean bool)<\/pre>\n\n\n\n
static String toString(int num, int radix)<\/code><\/pre>\n\n\n\nHow to use the toString() method<\/strong><\/h2>\n\n\n\n
public class Player{\npublic static void main(String args[]){\nPlayer player= new Player();\nInteger jersey=7;\nSystem.out.println(player.toString()); \n}\n}<\/code><\/pre>\n\n\n\nUnderstanding the problem without the toString() method<\/strong><\/h3>\n\n\n\n
public class Player{\npublic static void main(String args[]){\nPlayer player= new Player();\nInteger jersey=7;\nSystem.out.println(player); \n} }<\/code><\/pre>\n\n\n\nclass Player1{\nString name;\nint jersey;\nString club;\n\n \/\/Override the toString method\n public String toString() {\n return \"Player{\"+\"name=\"+name+\"\" +\",Jersey=\"+jersey+\",\"+\"Club=\"+club+\"}\";\n }\n\nPlayer1(int jersey, String name, String club){\nthis.jersey=jersey;\nthis.name=name;\nthis.club=club;\n}\n\npublic static void main(String args[]) {\n Player1 player = new Player1(10,\"Messi\",\"Paris Saint-Germain\");\n System.out.println(player.toString()); \n}\n}<\/code><\/pre>\n\n\n\npublic class BaseChange{\npublic static void main(String args[]){\n System.out.println(Integer.toString(2400,8)); \n}\n}<\/code><\/pre>\n\n\n\nAdvantage of Java toString() method<\/strong><\/h2>\n\n\n\n