【JAVA】String[]配列の相関

配列の做成：

1 ①String[] str = new String[5]; 2 
3 ②String[] str = new String[]{"","","","",""}; 4 
5 ③String[] str = {"","","","",""}; 6 
7 ④String[][] str = new String[2][2]; 8 
9 ⑤String[] str = new String[]{};

 配列の値の取得：

 1 //普通の方法
 2 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}};  3 for(int i=0;i<str.length;i++){  4     for(int j=0;j<str[i].length;j++){  5         System.out.println("str["+i+"]["+j+"]:"+str[i][j]);  6  }  7 }  8 //方法一（推薦）
 9 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}}; 10 for(String[] row : str){ 11     for(String s : row){ 12  System.out.println(s); 13  } 14 } 15 //方法二（推薦）
16 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}}; 17 System.out.println(Arrays.deepToString(str));