Java 语言全面指南：从入门到精通 (java语言是高级程序语言吗)

它们可以重复使用并传递参数。```javapublic static int add(int a, int b) {return a + b;}```

类和对象

类是对象的蓝图。对象是类的实例。```javapublic class Person {private String name;private int age;public Person(String name, int age) {this.name = name;this.age = age;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}}```

高级 Java

继承

继承允许一个类从另一个类继承属性和方法。```javapublic class Employee extends Person {private String jobTitle;private double salary;public Employee(String name, int age, String jobTitle, double salary) {super(name, age);this.jobTitle = jobTitle;this.salary = salary;}public String getJobTitle() {return jobTitle;}public void setJobTitle(String jobTitle) {this.jobTitle = jobTitle;}public double getSalary() {return salary;}public void setSalary(double salary) {this.salary = salary;}}```

多态

多态允许对象以其父类的类型进行操作。```javaPerson person = new Employee("John Doe", 30, "Software Engineer", 100000.00);System.out.println(person.getName()); // 输出：John Doe```

异常处理

异常处理用于处理错误和异常情况。```javatry {// 代码块可能会抛出异常} catch (Exception e) {// 处理异常}```

集合框架

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