ArrayList resultsList = new ArrayList();
String[] result = { "cr_tx_amt",(f_fare", "counts" };
resultsList.add(result);
	String[][] results = new String[resultsList.size()][];
			for (int i = 0; i < resultsList.size(); i++) {
				String[] temp = (String[]) resultsList.get(i);
				results[i] =new String[temp.length];
				System.out.print(temp.length);
				for (int j = 0; j < temp.length; j++) {
					results[i][j] = temp[j];
				}
			}
			return results;
 

注意：無論是一維陣列還是二維，每一維都必須指定長度，要不然會預設只有一個元素的空間。最好不要初始化為null。

定義一個型別的二維陣列 String[][] a;

定義一維陣列長度 a = new String[i][];

定義二維陣列長度 a[i] = new String[j]

例子：將一個字串的內容分隔，並且放入一個二維陣列中 

public class TestToString {  
   public static void main(String[] args) {  
     String s = "0,1;3,6,4;7,1";  
     String[] a = s.split(";");  
     double[][] d;  
     d = new double[a.length][];  
     for(int i=0; i<a.length; i++){  
         String[] s_num = a[i].split(",");  
         for(int j=0; j<s_num.length; j++){  
             d[i] = new double[s_num.length];  
             d[i][j] = Double.parseDouble(s_num[j]);  
             System.out.println("d[" + i + "][" + j +"] = " + d[i][j]);  
                 }  
     }  
  
  }