簡述
數組是每個編程語言的最常用的數據結構之一,二維數組應用場景比較廣泛,其賦值方式比普通的數組要複雜一些。
靜態初始化並賦值
//二維數組 靜態初始化
int[][] data = new int[][] { { 1, 2 }, { 2, 3 }, { 2, 3, 4 }, { 1, 2, 3, 4 } };
print(data);
動態賦值
//動態賦值
int[][] data2 = new int[3][2];
for (int i = 0; i < data2.length; i++) {
for (int j = 0; j < data2[i].length; j++) {
data2[i][j] = i * j;
}
}
print(data2);
動態列賦值
//動態列
int[][] data1 = new int[3][];
for (int i = 0; i < data1.length; i++) {
data1[i] = new int[i + 1];
for (int j = 0; j < data1[i].length; j++) {
data1[i][j] = i * j;
}
}
print(data1);
遍歷
private void print(int[][] data) {
System.out.println("----------------------------------------------------");
for (int i = 0; i < data.length; i++) {
for (int j = 0; j < data[i].length; j++) {
System.out.println(String.format("data[%s][%s] = %s", i, j, data[i][j]));
}
}
}