What are the three ways to initialize arrays in java
Nov 12, 2020 pm 04:29 PM
The three ways to initialize arrays in java are: 1. Static initialization, such as [int a[] = {2, 0, 1, 9, 2020}]; 2. Dynamic initialization, such as [int[ ] c = new int[4]]; 3. Default initialization, such as [int[]d=new int[5]].
Initialization method:
1. Static initialization
2. Dynamic initialization
3.Default Initialization
(Learning video sharing: java course)
Code sample:
import org.junit.Test;//import org.testng.annotations.Parameters;public class Demo {
@Test
public void test() {
//數(shù)組的靜態(tài)初始化
int a[] = {2, 0, 1, 9, 2020};
System.out.println("----------靜態(tài)初始化----------");
getArray(a);
//數(shù)組的動態(tài)初始化方法一
int[] b = new int[10];
for (int i = 0; i < b.length; i++) {
b[i] = i;
}
System.out.println("----------動態(tài)初始化1----------");
getArray(b);
//數(shù)組的動態(tài)初始化方法二
int[] c = new int[4];
c[1] = 2;
c[2] = 0;
c[3] = 9;
System.out.println("----------動態(tài)初始化2----------");
getArray(c);
//數(shù)組的默認(rèn)初始化，默認(rèn)初始化只指定數(shù)組的長度，數(shù)組里面每個元素的值都是默認(rèn)值
int[]d=new int[5];
System.out.println("----------默認(rèn)初始化----------");
getArray(d);
} public void getArray(int[]arr){
for (int j:arr){
System.out.println(j);
}
}
}Related recommendations:java introduction
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