2018/12/10作業
2018/12/10作業
1.定義一個點類Point,包含2個成員變數x、y分別表示x和y座標,2個構造器Point()和Point(int x0,y0),以及一個movePoint(int dx,int dy)方法實現點的位置移動,建立兩個Point物件p1、p2,分別呼叫movePoint方法後,列印p1和p2的座標。
int x ;
int y;
Point(){
}
Point (int x0,int y0){
x = x0;
y = y0;
}
void movePoint(){
x = x+10;
y = y-10;
System.out.println ("座標是"+x+","+y);
}
主函式:
int x= 15;
int y = 20;
Point p1 = new Point();
p1.x=x;
p1.y=y;
p1.movePoint();
Point p2 = new Point(15,20);
p2.movePoint();
2.定義一個矩形類Rectangle: [必做題]
2.1 定義三個方法:getArea()求面積、getPer()求周長,showAll()分別在控制檯輸出長、寬、面積、周長。
2.2 有2個屬性:長length、寬width
2.3 通過構造方法Rectangle(int width, int length),分別給兩個屬性賦值
2.4 建立一個Rectangle物件,並輸出相關資訊
int length;
int width;
Rectangle(){
}
Rectangle (int length,int width){
this.length = length;
this.width = width;
}
int getArea(){
int area = length*width;
return area;
}
int getPer(){
int per = 2*(length+width);
return per;
}
void showAll(){
int area = this.getArea ();
int per = this.getPer();
System.out.println("長:"+length+"寬:"+width+"面積:"+area+"周長"+per);
}
主函式
Rectangle r = new Rectangle(15,20);
r.showAll();
3.定義一個筆記本類,該類有顏色(char)和cpu型號(int)兩個屬性。 [必做題]
3.1 無參和有參的兩個構造方法;有參構造方法可以在建立物件的同時為每個屬性賦值;
3.2 輸出筆記本資訊的方法
3.3 然後編寫一個測試類,測試筆記本類的各個方法。
char color;
int cpu;
Note(){
}
Note(char color,int cpu){
this.color = color;
this.cpu = cpu;
}
void Note1(){
System.out.println("筆記本的顏色為: "+color);
System.out.println("筆記本的CPU為: "+cpu);
}
主函式
Note note = new Note('黑',6);
note.Note1();
}
4.定義兩個類,描述如下: [必做題]
4.1定義一個人類Person:
4.1.1定義一個方法sayHello(),可以向對方發出問候語“hello,my name is XXX”
4.1.2有三個屬性:名字、身高、體重
4.2定義一個PersonCreate類:
4.2.1建立兩個物件,分別是zhangsan,33歲,1.73;lishi,44,1.74
4.2.2分別呼叫物件的sayHello()方法。
String name;
int age;
int high;
int weight;
Person(){
}
Person (String name,int high,int weight){
this.name = name;
this.high = high;
this.weight = weight;
}
void sayHello(){
System.out.println("Hello My name is:"+name);
}
主函式
String name1 = "zhangsan";
String name2 = "lishi";
int age1 = 33;
int age2 = 44;
int high1 = 173;
int high2 = 174;
Person p1 = new Person();
p1.name = name1;
p1.age = age1;
p1.high =high1;
Person p2 = new Person();
p2.name = name2;
p2.age = age2;
p2.high = high2;
p1.sayHello();
p2.sayHello();
5定義兩個類,描述如下: [必做題]
5.1定義一個人類Person:
5.1.1定義一個方法sayHello(),可以向對方發出問候語“hello,my name is XXX”
5.1.2有三個屬性:名字、身高、體重
5.1.3通過構造方法,分別給三個屬性賦值
5.2定義一個Constructor類:
5.2.1建立兩個物件,分別是zhangsan,33歲,1.73;lishi,44,1.74
5.2.2分別呼叫物件的sayHello()方法。
String name;
int age;
int high;
int weight;
Person(){
}
Person (String name,int high,int weight){
this.name = name;
this.high = high;
this.weight = weight;
}
void sayHello(){
System.out.println("Hello My name is:"+name);
}
主函式
String name1 = "zhangsan";
String name2 = "lishi";
int age1 = 33;
int age2 = 44;
int high1 = 173;
int high2 = 174;
Person p1 = new Person(name1,age1,high1);
p1.sayHello();
Person p2 = new Person(name2,age2,high2);
p2.sayHello();