是所有 Java 类都直接或间接继承了Object类,而Object类中有一个默认的toString()方法,源码如下(基于JDK11): /** * Returns a string representation of the object. In general, the * {@codetoString} method returns a string that * "textually re
toString()); } catch (final NoSuchMethodException e) { throw new ConfigurationException("Method not found excetion when loading resource: " + name + " due to: " + e.toString()); } catch (final IllegalArgumentException e) { throw new ConfigurationException("Illegal argument excetion when ...
// Java program to demonstrate// LinkedHashSet toString() methodimportjava.util.*;publicclasscollection{publicstaticvoidmain(Stringargs[]){// Creating an Empty LinkedHashSetLinkedHashSet<String>abs=newLinkedHashSet<String>();// Use add() method// to add elements to the Collectionabs.add("Wel...
Example: Java String toString() Method The following example shows the usage of java String() method. importjava.util.Scanner;importstaticjava.lang.System.*;publicclassIntegerToString{publicstaticvoidmain(String[]args){System.out.println();// Ask user inputSystem.out.print("Input Desired Value:"...
(Java toString method) Let’s first establish why I said earlier that you have used toString method even though you might not know it. Do you agree to useSystem.out.println(object);for learning and debugging purposes? I have used that a lot in my early days and still use it to debug...
Example 1 – toString() In this example, we will create a StringBuilder object and initialize with some string passed as argument. We will get the string from the StringBuilder using toString() method. Java Program </> Copy class Example { ...
The getClass() method returns the runtime class of the class the object belongs to. The getName() method then returns the full-fledged class name. For example, if you have a class “BMW” in the package “com.marcusbiel.java8course” and you instantiate a BMW object, a call to get...
* capital letters represents a single decimal digit.) * * If any of the three parts of this phone number is too small * to fill up its field, the field is padded with leading zeros. * For example, if the value of the line number is 123, the last ...
Example 2: toString() with Nested Arrays When we use thetoString()method in a nested array, the array is flattened. For example: // defining a nested arrayletnestedArray = [1,2,4, ["Apple",5]]; // returns string representation of the nested array by flattening the arrayletresultingArr...
Java.IO Java.Lang Java.Lang.Annotation Java.Lang.Annotation AnnotationFormatError AnnotationTypeMismatchException Documented DocumentedAttribute ElementType IAnnotation IAnnotation 方法 AnnotationType Equals GetHashCode ToString IDocumented IInherited INative ...