如果我们在超出变量作用范围的地方尝试访问变量,编译器将报错。 publicclassLocalVariableExample{publicstaticvoidmain(String[]args) 1.
publicstaticString myClassVar="class or static variable(类或静态变量)"; publicstaticvoidmain(String args[]){ StaticVarExample obj =newStaticVarExample(); StaticVarExample obj2 =newStaticVarExample(); StaticVarExample obj3 =newStaticVarExample(); //下面三行代码显示以下文字: "class or static var...
publicstaticString myClassVar="class or static variable(类或静态变量)"; publicstaticvoidmain(String args[]){ StaticVarExample obj = newStaticVarExample(); StaticVarExample obj2 = newStaticVarExample(); StaticVarExample obj3 = newStaticVarExample(); //下面三行代码显示以下文字: "class or static...
Java ThreadLocal Example Here is a small example showing use of ThreadLocal in java program and proving that every thread has it’s own copy of ThreadLocal variable. ThreadLocalExample.java Copypackagecom.journaldev.threads;importjava.text.SimpleDateFormat;importjava.util.Random;publicclassThreadLocal...
GlobalVariableExampleAnotherClass 在上面的类图中,GlobalVariableExample和AnotherClass是两个类,它们之间存在关联关系。GlobalVariableExample类包含了全局变量globalVar,而AnotherClass类使用该全局变量。 总结 在Java中,全局变量存储在Java虚拟机内存中的静态存储区域中。它们在整个程序中都可以访问,并且可以在不同的类之间...
public class VariableAccessExample { // 类变量 static int classVariable = 10; // 成员变量 int instanceVariable = 20; public void method() { // 局部变量 int localVariable = 30; // 访问局部变量 System.out.println("局部变量: " + localVariable); ...
Error: Unable to initialize main class Foo Caused by: java.lang.VerifyError: BadlocalvariabletypeException Details: Location:Foo.unused()V @0: iload_1 Reason: Type top (current frame, locals[1]) is not assignable to integer Current Frame: bci: @0 flags: { } locals: {'Foo'} stack: {...
Example: System.out.println(Integer.MAX_VALUE); 局部变量(local variable) 定义在一个区块内(通常会用大括号包裹),区块外部无法使用的变量。 定义在一个区块内(通常会用大括号包裹),没有访问修饰符,区块外部无法使用的变量。 没有默认值,所以必须赋初始值 ...
local variable A data item known within a block, but inaccessible to code outside the block. For example, any variable defined within a method is a local variable and can't be used outside the method. long A Java keyword used to define a variable of type long. M member A field or...
This example demonstrates creating a local unnamed variable. int_=q.remove();// We don't need the result The following example demonstrates using an unnamed variable incatchblock. Stringinput=...;try{inti=Integer.parseInt(input);// use i}catch(NumberFormatException_){System.out.println("Invali...