java类和对象——变量赋值方法

心已赠人 2023-07-17 11:18 46阅读 0赞

## 方法一 ##

class Text{
        
        public String name;
        public int age;
        public int number;
        public void show(){
        
            System.out.println("姓名："+name+" 年龄："+age +" 学号："+number);
        }
    }
    public class Homework {
        
        public static void main(String[] args) {
        
            Text p1 = new Text();
            p1.name = "cathy";
            p1.age = 10;
            p1.number = 20180406;
            p1.show();

## 方法二 ##

class Text{
        
        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;
        }
    
        public int getNumber() {
        
            return number;
        }
    
        public void setNumber(int number) {
        
            this.number = number;
        }
     }
    public class Homework {
        
        public static void main(String[] args) {
        
            //第二种赋值方法
            Text p2 = new Text();
            p2.setName("dongdong");
            System.out.println(p2.getName());
            p2.setAge(20);
            System.out.println(p2.getAge());
            p2.setNumber(20180304);
            System.out.println(p2.getNumber());

此处的set和get的方法可以用 atl + insert 选择Getter and Setting实现

## 方法三 ##

class Text{
         
      Text(){
        
        }
        Text(String name,int age,int number){
        
            this.name = name;
            this.age = age;
            this.number = number;
            System.out.println("姓名："+name+" 年龄："+age +" 学号："+number);
        }
    }
    public class Homework {
        
        public static void main(String[] args) {
        
           Text p3 = new Text("bobi",50,20180302);
    }