1. For loop traversal
Usually traversing an array is implemented using a for loop. Traversing a one-dimensional array is very simple. Traversing a two-dimensional array requires a double-layer for loop. The length of the array can be obtained through the length property of the array.
Program example:
package captain;
public class ArrayDemo {
public static void main(String[] args) {
// TODO Auto-generated method stub
int arr[][] = new int[][]{{1},{2,3},{4,5,6}};
//for循環(huán)遍歷二維數(shù)組。
for(int i = 0; i < arr.length; i++){
for(int j = 0; j < arr[i].length; j++){
System.out.print(arr[i][j]);
}
System.out.println();
}
}
}2. Foreach statement traversal
When traversing an array, it is simpler to use the foreach statement.
Program example:
package captain;
public class ArrayDemo2 {
public static void main(String[] args) {
// TODO Auto-generated method stub
int arr[][] = new int[][]{{4,3},{1,5}};
//foreach語句遍歷二維數(shù)組。
System.out.println("數(shù)組中的元素是：");
for(int x[]:arr){ //外層遍歷得到一維數(shù)組
for(int e:x){ //內(nèi)層遍歷得到數(shù)組元素
System.out.print(e);
}
System.out.println();
}
}
}3. ToString static method traversal in the Arrays tool class
Use the toString static method in the Arrays tool class to traverse a The dimensional array is converted into string form and output.
Program example:
package captain;
import java.util.Arrays;
public class ArrayDemo3 {
public static void main(String[] args) {
// TODO Auto-generated method stub
//Arrays工具類的toString靜態(tài)方法遍歷二維數(shù)組。
int arr[][] = new int[][]{{9,8},{7,6,5}};
for(int i = 0; i < arr.length; i++){//循環(huán)得到一維數(shù)組
System.out.println(Arrays.toString(arr[i]));//將一維數(shù)組轉(zhuǎn)化為字符串輸出
}
}
} Recommended tutorial: Java tutorial
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