java入門的文法學習

標籤：

1.類的定義及使用：

範例代碼：

class Main{String name;int age;String sex;String address;void eat(){System.out.println("我會吃飯 ");}void run(){System.out.println("我會跑步  ");}public static void main(String[] args) {Main p;p = new Main();p.name = "張三";p.age=18;p.sex="女";p.address = "山東淄博";System.out.println(p.name+"說：");        System.out.println("我叫"+p.name );        System.out.println("性別"+p.sex);        System.out.println("我今年"+p.age+"歲");        System.out.println("我住在"+p.address );        p.eat();        p.run();}}

 也可以這樣寫：

package java_1;class person{String name;int age;String sex;String address;void eat(){System.out.println("我會吃飯 ");}void run(){System.out.println("我會跑步  ");}}public class Main{public static void main(String[] args) {person p;p = new person();p.name = "張三";p.age=18;p.sex="女";p.address = "山東淄博";System.out.println(p.name+"說：");        System.out.println("我叫"+p.name );        System.out.println("性別"+p.sex);        System.out.println("我今年"+p.age+"歲");        System.out.println("我住在"+p.address );        p.eat();        p.run();}}

 

java入門的文法學習