JAVA-数组使用
- For-Each循环
- 数组作方法入参
- 数组作返回值
public class Demo3 {
public static void main(String[] args) {
int[] arrays={
1,2,3,4,5};
for (int i = 0; i <arrays.length ; i++) {
System.out.println(arrays[i]);
}
System.out.println("==========================");
int sum=0;
for (int i = 0; i <arrays.length ; i++) {
sum+=arrays[i];
}
System.out.println("sum="+sum);
System.out.println("==========================");
int max=arrays[0];
for (int i = 0; i <arrays.length ; i++) {
if (arrays[i]>max){
max=arrays[i];
}
}System.out.println("数组最大值:"+max);
}
}
数组进阶
public class Demo4 {
public static void main(String[] args) {
int[] arrays ={
1,2,3,4,5};
int[] reverse = reverse(arrays);
printArray(reverse);
}
public static void printArray(int[] arrays){
for (int i = 0; i <arrays.length ; i++) {
System.out.println(arrays[i]);
}
}
public static int[] reverse(int[]arrays){
int[] result=new int[arrays.length];
for (int i = 0,j= result.length-1;i <arrays.length ; i++,j--) {
result[j]=arrays[i];
}
return result;
}
}