Java10-5_数组的使用
作者:互联网
数组的使用
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For语句
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For-Each循环
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数组作方法入参
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数组作返回值
Practice 1
For循环打印全部数组元素
1 package com.Xujie.Day10; 2 3 public class Java10_03 { 4 public static void main(String[] args) { 5 int[] arrays={1,2,3,4,5}; 6 for (int i = 0; i < arrays.length; i++) { 7 System.out.println(arrays[i]); 8 } 9 } 10 }
Practice 2
For循环计算所有数组元素之和
1 package com.Xujie.Day10; 2 3 public class Java10_04 { 4 public static void main(String[] args) { 5 int[] array={1,2,3,4,5}; 6 int sum=0; 7 for (int i = 0; i < array.length; i++) { 8 sum+=array[i]; 9 } 10 System.out.println(sum); 11 } 12 }
Practice 3
For循环查找数组中最大元素
1 package com.Xujie.Day10; 2 3 public class Java10_05 { 4 public static void main(String[] args) { 5 int[] arrays={1,2,3,4,5}; 6 int max=arrays[0]; 7 for (int i = 1; i < arrays.length ; i++) { 8 if (max< arrays[i]){ 9 max=arrays[i]; 10 } 11 } 12 System.out.println(max); 13 } 14 }
Practice 4
使用forEach循环打印数组元素
1 package com.Xujie.Day10; 2 3 public class Java10_06 { 4 //JDK1.5 引入forEach 没有下标 5 public static void main(String[] args) { 6 int[] arrays={1,2,3,4,5}; 7 printArray(arrays); 8 9 } 10 public static void printArray(int[] arrays){ 11 for (int i = 0; i < arrays.length; i++) { 12 System.out.print(arrays[i]+"\t"); 13 } 14 } 15 }
Practice 5
翻转数组(难点,重点)
1 package com.Xujie.Day10; 2 3 import static com.Xujie.Day10.Java10_06.printArray; 4 5 public class Java10_07 { 6 public static void main(String[] args) { 7 int[]arrays={1,2,3,4,5}; 8 int[] reverse= reverse(arrays); 9 printArray(reverse); 10 } 11 public static int[] reverse(int arrays[]){ 12 int[] result=new int[arrays.length]; 13 for (int i=0,j= result.length-1;i< result.length;i++,j--){ 14 result[j]=arrays[i]; 15 } 16 return result; 17 } 18 }
标签:Java10,int,arrays,length,static,数组,使用,public 来源: https://www.cnblogs.com/xujie-0528/p/13565459.html