方法只能声明局部变量。这就是为什么当您尝试将其声明为public时，编译器会报告错误的原因。
对于局部变量，您不能使用任何类型的访问器（公共，受保护或私有）。
您还应该知道static关键字的含义。在方法中
checkYourself，您使用Integer数组
locations。
static关键字区分对象创建可访问的元素。因此，它们不是对象本身的一部分。
public class Test { //Capitalized name for classes are used in Java private final init[] locations; //key final mean that, is must be assigned before object is constructed and can not be changed later. public Test(int[] locations) { this.locations = locations;//To access to class member, when method argument has the same name use `this` key word. } public boolean checkYourSelf(int value) { //This method is accessed only from a object. for(int location : locations) { if(location == value) { return true; //When you use key word return insied of loop you exit from it. In this case you exit also from whole method. } } return false; //Method should be simple and perform one task. So you can get more flexibility. } public static int[] locations = {1,2,3};//This is static array that is not part of object, but can be used in it. public static void main(String[] args) { //This is declaration of public method that is not part of create object. It can be accessed from every place. Test test = new Test(Test.locations); //We declare variable test, and create new instance (object) of class Test. String result; if(test.checkYourSelf(2)) {//We moved outside the string result = "Hurray"; } else { result = "Try again" } System.out.println(result); //We have only one place where write is done. Easy to change in future. } }
