【JAVA】String[]配列の相関

配列の作成：

 ①String[] str = new String[5];

 ②String[] str = new String[]{"","","","",""};

 ③String[] str = {"","","","",""};

 ④String[][] str = new String[2][2];

 ⑤String[] str = new String[]{};

配列の値の取得：

 //普通の方法
 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}};
 for(int i=0;i<str.length;i++){
     for(int j=0;j<str[i].length;j++){
         System.out.println("str["+i+"]["+j+"]:"+str[i][j]);
     }
 }
 //方法一（推薦）
 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}};
 for(String[] row : str){
     for(String s : row){
         System.out.println(s);
     }
 }
 //方法二（推薦）
 String[][] str = new String[][]{{"a","b","c"},{"d","e","f"},{"g","h","i"}};
 System.out.println(Arrays.deepToString(str));