public class Variable{
static int allClicks=0; // 类变量 String str="hello world"; // 实例变量 public void method(){ int i =0; // 局部变量 }
}
public class Test{
public void pupAge(){
int age = 0;
age = age + 7;
System.out.println("小狗的年龄是: " + age);
} public static void main(String[] args){
Test test = new Test();
test.pupAge();
}
}
public class Test{
public void pupAge(){
int age;
age = age + 7;
System.out.println("小狗的年龄是 : " + age);
} public static void main(String[] args){
Test test = new Test();
test.pupAge();
}
}

吴裕雄--天生自然 JAVA开发学习:变量类型-LMLPHP

import java.io.*;
public class Employee{
// 这个实例变量对子类可见
public String name;
// 私有变量,仅在该类可见
private double salary;
//在构造器中对name赋值
public Employee (String empName){
name = empName;
}
//设定salary的值
public void setSalary(double empSal){
salary = empSal;
}
// 打印信息
public void printEmp(){
System.out.println("名字 : " + name );
System.out.println("薪水 : " + salary);
} public static void main(String[] args){
Employee empOne = new Employee("RUNOOB");
empOne.setSalary(1000);
empOne.printEmp();
}
}

吴裕雄--天生自然 JAVA开发学习:变量类型-LMLPHP

import java.io.*;

public class Employee {
//salary是静态的私有变量
private static double salary;
// DEPARTMENT是一个常量
public static final String DEPARTMENT = "开发人员";
public static void main(String[] args){
salary = 10000;
System.out.println(DEPARTMENT+"平均工资:"+salary);
}
}
05-11 13:06