부산IT JAVA 3-1

//Test01.java

//로또1~45까지6개
//난수를발생시켜6개의수를배열에넣어출력하시오
//@@단, 중복된숫자가배열에들어가면안됨
//배열출력(로또번호출력)
//int r = (int)(Math.random()*45)+1;

int[] lotto = new int[6];
int n=0;
while(n<lotto.length) {
int r = (int)(Math.random()*45)+1;
lotto[n]=r
//배열에중복된값이있는지조사, 있으면넣은값빼기
for(int i=0;i<ni++) {
if(r==lotto[i]) {
n--;//중복제거
break
}
}
n++;
}//while
for(int num:lotto) {
System.out.println(num);
}

//Student.java

package com.day03;

public class Student {
int studentID, grade;
String name;

public Student() {}

public Student(String name, int StudentID, int grade) {
	this.studentID=StudentID;
	this.grade=grade;
	this.name=name;
}

public Student(int StudentID, String name, int grade) {
	//이렇게도 쓸 수 있다
    this(name,studentID,grade);
}


public void study() {
	System.out.println(name+" 공부하다");
}
	
public void play() {
	System.out.println(name+" 운동하다");
}
	
	public static void main(String[] args) {
		Student s1 = new Student();
		s1.studentID=100;
		s1.grade=1;
		s1.name="홍길동";
		s1.study(); //홍길동 공부하다
		
		Student s2 = new Student("이순신",200,3);
		s2.study(); //이순신 공부하다
		
		Student s3 = new Student(300,"강감찬",4);
		s3.study();//강감찬 공부하다
		s3.play();//강감찬 운동하다
	}

}

//StudentScore.java

package com.day03;

public class StudentScore {
String name;
int kor,math;

	public StudentScore() {}
	public StudentScore(String name, int kor, int math) {
		this.name=name;
		this.kor=kor;
		this.math=math;
	}
	
	public int getTotal() {
		return kor+math;
	}
	
	public float getAvg() {
		//return (kor+math)/2.0f;
		return getTotal()/2.0f;
	}
	
	public static void main(String[] args) {

		StudentScore s1 = new StudentScore("홍길동",100,85);
		StudentScore s2 = new StudentScore("이순신",50,70);
		System.out.println("이름:"+s1.name);
		System.out.println("국어:"+s1.kor);
		System.out.println("수학:"+s1.math);
		System.out.println("총점:"+s1.getTotal());
		System.out.println("평균:"+s1.getAvg());
	}
}