Java如何创建一个类？ java如何定义一个类，创建它的成员变量和方法？
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public class Person { private int age;//\u5e74\u9f84 private int height;//\u8eab\u9ad8 private int weight;//\u4f53\u91cd private String sex;//\u6027\u522b public void look (){ //\u770b } public void eat () { //\u5403 } public void run (){ //\u8dd1 } //\u8fd8\u6709\u4e00\u4e9b\u4f60\u8ba4\u4e3a\u5408\u7406\u7684\u65b9\u6cd5 public int getAge() { return age; } public void setAge(int age) { this.age = age; } public int getHeight() { return height; } public void setHeight(int height) { this.height = height; } public int getWeight() { return weight; } public void setWeight(int weight) { this.weight = weight; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } }\u56de\u7b54\u7684\u6709\u70b9\u7b80\u5355\uff0c\u4e0e\u5176\u8bf4\u5982\u4f55\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u8fd8\u4e0d\u5982\u8bf4\u5982\u4f55\u7406\u89e3\u9762\u5411\u5bf9\u8c61\u7684\u601d\u60f3!!
class TestInner{
public static void main(String [] args)
{
Outer outer = new Outer();
Outer.Inner inner = outer.new Inner();
}
}
在内部类（Inner Class），可以随意的访问外部类的成员，这可让我们更好地组织管理我们的代码，增强代码的可读性。
1、定义一个类，class A={}，然后创建这个类对象，A a = new A();有没有参数看你类定义的构造函数；
2、继承java已有的类，以异常类为例，class A extends Exception{}
3、实现java已有接口或者抽象类，class A implements Runnable{}
4、单继承多实现，class A extends B implements C,D{}
比如老师给你个作是，定义一个人类，人类下面有学生和老师。你可以这样子定义,然后又一个Test类，来实现老师，学生，人类之间的关系。。
Public class Person{
}
class Student{
}
class Teacher{
}
class Test{
public static void main(String arg[]){
//写内容。。
}
}
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绛旓細寤虹珛涓涓狫avaproject鈥斺旂偣鍙抽敭鏂板缓涓涓被锛岀被鍚嶅瓧鏈濂芥槸澶у啓寮澶锛孡Z 鎴戠粰浣犲啓涓涓畝鍗曠殑绫籠x0d\x0apublic class Test{\x0d\x0a//瀹氫箟鎴愬憳鍙橀噺\x0d\x0aint width=10;\x0d\x0aint height=10;\x0d\x0a// 鎴愬憳鏂规硶\x0d\x0apublic area(){\x0d\x0a return width*...
绛旓細绫诲悕棣栧瓧姣嶄範鎯澶у啓,渚嬪:HelloWorld 绫诲悕鍜屽彉閲忓悕姣忎釜鍗曡瘝鐢ㄥぇ鍐欏瓧姣嶆牸寮, 骞朵笖鍙橀噺鍚嶄互灏忓啓瀛楁瘝寮澶, 濡 userData;涓涓狫AVA绫鏂囦欢鏈濂鏈変竴涓public绫,鑰屼笖鍙兘鏈変竴涓.璁块棶鏉冮檺鐪嬫儏鍐, 鍘熷垯鏄敖鍙兘鐨勭鏈(private),涓嶅緱灏变繚鎶(protected),鏈鍚庢槸鍏湁(public). 濡傛灉鏄嚜宸辫灏佽jar,涓嶇粰鍒汉鐢,...
绛旓細Java鍒涘缓涓涓被鐨勫璞￠氳繃new鍏抽敭瀛楀垱寤猴細璇硶濡備笅锛氱被 瀵硅薄 = new 绫绘瀯閫犳柟娉曪紙锛夛紱瀹炰緥锛歱ublic class Person{ String name;char sex;int age;public static void main(String[] args){ //鍦╩ain鏂规硶瀹屾垚Person绫荤殑瀵硅薄person鍒涘缓 Person person1 = new Person();} } 浣犳槑鐧戒簡鍚楋紵
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