2022/4/21 JavaDay13
阿新 • • 發佈：2022-04-21
陣列巢狀陣列
package com.sundada.array;
public class ArrayDemo05 {
public static void main(String[] args) {
int[][]array={{1,2},{2,3},{3,4},{4,5}};
//[4][2]
/*1,2
*2,3
*3,4
* 4,5
* */
for (int i = 0; i < array.length; i++) {
for (int j = 0; j < array[i].length; j++) {
System.out.println(array[i][j]);
}
}
// printArray(array[0]);
// System.out.println(array[0][1]);
}
// public static void printArray(int[]arrays){
// for (int i = 0; i < arrays.length; i++) {
// System.out.println(arrays[i]);
// }
// }
} Arrays類
package com.sundada.array;
import java.util.Arrays;
public class ArrayDemo06 {
public static void main(String[] args) {
int[]a={1,2,3,4,999,123,324,534,6,34};
System.out.println(a);//hashcode-[I@1b6d3586
Arrays.sort(a);//升序
System.out.println(Arrays.toString(a)); //列印陣列
Arrays.fill(a,2,4,0);//陣列填充
System.out.println(Arrays.toString(a));
//printArray(a);
}
public static void printArray(int[]a)
{
for (int i = 0; i < a.length; i++) {
if ( i==0 ) System.out.print("[");
else if ( i==a.length-1 ) System.out.println(a[i]+"]");
else System.out.print(a[i]+",");
}
}
}