正确的应该去掉void: packageStudent;importmyutils.*;publicclassStudentextendsCommon{publicStudent(){ }publicStudent(String name,intage,intmoney){super(name, age, money); }publicvoidgetSomeMoney(intmoney){inthasMoney=super.getMoney();super.setMoney(hasMoney + money); } }...
classProduct{publicStringname;publicProduct(){this("Mouse");this.name="Keyboard";}publicProduct(Stringname){this.name=name;}} When you move the constructor call below thethis.nameassignment, Java will throw thecall to this must be first statement in constructor: classProduct{publicStringname;publ...
Note that user code cannot perform such an action directly in a subclass constructor, since the target must be fixed before theConstantCallSiteconstructor returns. The hook is said to bind the call site to a target method handle, and a typical action would besomeTarget.bindTo(this). However...
Java documentation for java.lang.invoke.CallSite. 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 Attribution License. Constructors 展开表 CallSite(IntPtr, JniHandleOwners...
{this.name}`); }; function Child(name, age) { Parent.call(this, name); // 调用父类构造函数 this.age = age; } // 设置原型链以实现继承 Child.prototype = Object.create(Parent.prototype); Child.prototype.constructor = Child; const child = new Child('Alice', 10); child.sayHello(); ...
classPerson{privateintage;publicPerson() { System.out.println("wu can gou zao"); }publicPerson(inta) {age=a; System.out.println("you can gou zao"); System.out.println("age shi"+a); this(); } } 报错:Constructor call must be the first statement in a constructor ...
JAVA.Security.Acl JAVA.Security.Cert JAVA.Security.Interfaces JAVA.Security.Spec JAVA.Sql JAVA.Text JAVA.Time JAVA.Time.Chrono JAVA.Time.Format JAVA.Time.Temporal JAVA.Time.Zone JAVA.Util JAVA.Util.Concurrent JAVA.Util.Concurrent.Atomic JAVA.Util.Concurrent.Locks ...
initialization is impossible without primary constructor class InternetConnectivityHelper :ConnectivityManager.NetworkCallbackInternetStatusChangedListener): super(){ }class InternetConnectivityHelper :ConnectivityManager.NetworkCallback 浏览0提问于2019-10-10得票数 1 ...
java.lang.Object RuntimeException FabricException system.fabric.exception.InvalidReentrantCallException public class InvalidReentrantCallException extends FabricException Constructor Summary 展開資料表 ConstructorDescription InvalidReentrantCallException() InvalidReentrantCallException(String message) Inval...
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