# 배열 활용

1. 배열의 요소 중에서 최대값과 최소값 찾기

```java
class Ex5_3 { 
	public static void main(String[] args) { 
		int[] score = { 79, 88, 91, 33, 100, 55, 95 }; 

		int max = score[0]; 
		int min = score[0]; 

		for(int i=1; i < score.length;i++) {
			if(score[i] > max) { 
				max = score[i]; 
			} else if(score[i] < min) { 
				min = score[i]; 
			} 
		} // end of for 

		System.out.println("최대 :" + max);       
		System.out.println("최소 :" + min);       
	} // end of main 
} // end of class
```

2\. shuffle(섞기) : 숫자 섞기, 로또번호 생성

```java
class lottery {
	public static void main(String[] args) {
		int[] ball = new int[45];//45개의 정수값을 저장하기 위한 int타입의 배열을 만들어준다.
		
		//배열의 각 요소에 1~45의 값을 저장한다.
		for(int i=0; i < ball.length; i++) {
			ball[i] = i+1;
		}
		
		int tmp = 0;
		int index = 0;
		
		//6개의 로터리 번호를 생성해보자!
		for(int i=0; i < 6;i++) {
//			index = Math.random()*(ball.length);
			index = (int)(Math.random()*45);//배열의 index인 0부터 44사이의 랜덤한 수 생성!
			tmp = ball[i];
			ball[i] = ball[index];
			ball[index] = tmp;
		}
		
		for(int i = 0; i <6;i++) {
			System.out.printf("ball[%d] = %d%n",i,ball[i]);
		}
	}
}
```


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