2차원 배열

public class quiz1 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
//		String[] name = new String[3];
//		name[0] = "kim";
//		name[1] = "dd";
//		name[2] = "qq";
//		System.out.println(name[0]);
//		출력값 : kim
		
//		
//		String[] name = {"kim","echo","bravo"};
//		System.out.println(name[2]);
//		출력값 : bravo
		
//		int[][] score = new int[4][3];
//		score[0][0] = 100;
//		System.out.println(score[0][0]);
//		출력값 : 100
		

//		다른 표현방법
//		int[][] score = new int[][] {{1,2,3},{4,5,6}};
		
		int[][] score = {
				{1,2,3},
				{4,5,6}
		};
		
		System.out.println(score[0][2]);
//		출력값 : 3
		
	}

}

 

public class q5_5 {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int[] ballarr = {1,2,3,4,5,6,7,8,9};
		int[] ball3 = new int[3];
		
		for(int i=0; i<ballarr.length;i++) {
			int j = (int)(Math.random()* ballarr.length);
			int tmp = 0;
			
            
            //서로 값 옮기기
			tmp = ballarr[i];
			ballarr[i] = ballarr[j];
			ballarr[j] = tmp;
			
			
		}
		
		for(int i=0;i<ball3.length;i++) {
			ball3[i] = ballarr[i];
		}
		
		for(int i=0;i<ball3.length;i++) {
			System.out.print(ball3[i]);
		}
		
	}

}