在main() 中,static方法callme() 和static 变量b在它们的类之外 被访问。 class StaticDemo { static int a = 42; static int b = 99; static void callme() { System.out.println("a = " + a); } } class StaticByName { public static void main(String args[]) { StaticDemo.callme(); Sy...
【情况一】:在静态方法中引用了一个非静态方法 报错:Non-static method 'xxx()' cannot be referenced from a static context 形如: 代码语言:javascript 代码运行次数:0 publicclassMyClass{publicvoidnonStaticMethod(){// 非静态方法实现}publicstaticvoidstaticMethod(){// 在静态方法中引用非静态方法,会导致错...
* All instances will share one static method, consider the consistency when the method operate a static (global) variable. [ as to its local variables, each thread has self stack. This's similar to non-static method ] Then to consider whether to declare as static : * If you really no ...
TestVoidMethod.java 文件代码: publicclassTestVoidMethod{publicstaticvoidmain(String[]args){printGrade(78.5);}publicstaticvoidprintGrade(doublescore){if(score>=90.0){System.out.println('A');}elseif(score>=80.0){System.out.println('B');}elseif(score>=70.0){System.out.println('C');}elseif(...
publicstaticvoidmain(String[] args){ inttemperature =30; if(temperature >25) {// 条件表达式: temperature > 25 System.out.println("It's a hot day!");// 当temperature > 25时执行 } // 如果temperature <= 25,则...
nonStaticMethod(); // 错误:Non-static method 'nonStaticMethod()' cannot be referenced from a static context } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 解决这个问题的方法是,要么将非静态方法改为静态方法,或者在静态方法内部创建实例对象后调用非静态方法。
* this method should be invoked from the * event dispatch thread. */privatestaticvoidcreateAndShowGUI(){//Create and set up the window.FocusEventDemo frame=newFocusEventDemo("FocusEventDemo");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//Set up the content pane.frame.addComponentsToP...
The static method is public. The static method is private. 2. An Example Class To make the demonstration and explanation easier, let’s first create a GreetingAndBye class as the example: public class GreetingAndBye { public static String greeting(String name) { return String.format("...
程序代码如下:运行结果如下:结果没问题的!在java中,对于静态方法有两种调用方法:类名调用对象引用你的class staticTest内部的geti()函数是定义的静态函数,static即类函数，使用的时候不需要对象引用，直接类名调用就行：staticTest.geti()这个是警告吧。静态方法应该使用 ClassName.staticMethod(args) 这样...
这个是警告吧。静态方法应该使用 ClassName.staticMethod(args) 这样的方式使用。你的class staticTest内部的geti()函数是定义的静态函数,static即类函数，使用的时候不需要对象引用，直接类名调用就行：staticTest.geti()程序代码如下:运行结果如下:结果没问题的!在java中,对于静态方法有两种调用方法:类名...