所以要重写toString()方法。 当需要将一个对象输出到显示器时,通常要调用他的toString()方法,将对象的内容转换为字符串.java中的所有类默认都有一个toString()方法。 默认情况下 System.out.println(对象名)或者System.out.println(对象名.toString())输出的是此对象的类名和此对象对应内存的首地址如果想自定义输...
publicclassPerson{privateStringname;privateintage;publicPerson(Stringname,intage){this.name=name;this.age=age;}@OverridepublicStringtoString(){return"Person{"+"\n"+"name='"+name+'\''+"\n"+", age="+age+"\n"+'}';}publicstaticvoidmain(String[]args){Personperson=newPerson("Alice",25);S...
return false; }*/@Overridepublicbooleanequals(Object o){if(this== o)returntrue;//getClass() != o.getClass() 使用反射技术,判断o是否是Person类型 等效于 obj instanceof Personif(o ==null|| getClass() != o.getClass())returnfalse;Personperson=(Person) o;returnage== person.age && Object...
String s = "儿子"; @Override public String bark() { return s; } } public class FieldOverriding { public static void main(String[] args) { Sub c1 = new Sub(); System.out.println(c1.s); System.out.println(c1.bark()); Super c2 = new Sub(); System.out.println(c2.s); System...
代码语言:java 复制 publicabstractclassMyAbstractClass{publicabstractStringtoString();}publicclassMySubClassextendsMyAbstractClass{@OverridepublicStringtoString(){return"This is the overridden toString method in the subclass.";}} 在这个例子中,子类MySubClass覆盖了抽象类MyAbstractClass中的toString方法。子类中...
@Override publicString toString() { returnnewToStringBuilder(this) .appendSuper(super.toString()) .append("location", location).toString(); } } Output: com.howtodoinjava.model.GuestUser@6483dae1[firstName=Lokesh,lastName=Gupta,age=30,location=New Delhi] ...
@Override public String asText() { return _value; } toString () 它被Object 覆盖。因此,它是 对象的文本表示。所以, toString 实际上返回给定对象的完整文本形式。并且,根据其在 TextNode 中的实施。它将引号(在开头和结尾)附加到您的值。 /** * Different from other values, Strings need quoting *...
Namespace: Java.Lang Assembly: Mono.Android.dll C# Kopie public override string ToString(); Gibt zurück String Hinweise Teile dieser Seite sind Änderungen auf der Grundlage von Arbeiten, die vom Android Open Source-Projekt erstellt und freigegeben werden und gemäß den in der Creative...
Namespace: Java.Interop Assembly: Java.Interop.dll C# 复制 public override string ToString(); Returns String Remarks Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 ...
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_view_diary_entries); db = new MyDBHandler(this); // Displays the database items. displayItems(); } // To display items in the listview. ...