java二維數組的遍歷

public class a_1 {

public static void main(String[] args) {

	int a[][] = { { 1, 2, 4 }, { 1, 3, 4 } };
	
	// 二維數組的第一種方法遍歷
	
	for (int i = 0; i < a.length; i++) {
	

		for (int j = 0; j < a[i].length; j++) {
		
			if (j != 0)
			
				System.out.print(" ");
				
			System.out.print(a[i][j]);
			
		}

		System.out.println();
		
	}
	
   //二維數組的第二種遍歷
   
	for (int i[] : a) {
	
		for (int j : i) {
		
			System.out.print(j + " ");
			
		}
		
		System.out.println();
		
	}
	
}

}