java数组

码农的这些年,总在说学习完这个语言就结束了,学习完那个语言就结束了,可是最终还是没有停止学习的时侯。

人的一生是学习的一生,程序员的一生,更是学习的一生。

我告诉我自已,java 是我最后学习的一门语言,以后不再会有python,delphi等的学习。。。。。。


package xuexi;

public class ceshi2 {

public static void main(String[] args) {

int[] ar = {1,2,3,4,5};

System.out.println(”  “);

System.out.println(ar.length);

for(int i=0; i<ar.length; i++){

System.out.println(“数组” + ar[i]);

}

}} 

package xuexi;
import java.util.Random;public class ceshi2 {public static void main(String[] args) {Random abc = new Random(); //随机数对象int[] ar = null; //空数组ar = new int[abc.nextInt(10)]; //使用数组 ar = new int[10];for(int i=0; i<ar.length; i++){ar[i] = abc.nextInt(100);System.out.println(ar[i]);}}}

package xuexi;import java.util.Random;public class ceshi2 {public static void main(String[] args) {Random rand = new Random(); //创建一个对象int[] ara = null;int[] arb = null;ara = new int[rand.nextInt(10)];arb = ara;for(int i=0; i<ara.length; i++){System.out.println(i + ara[i]);}}}package xuexi;import java.util.Random;public class ceshi2 {public static void main(String[] args) {//声明数组int[] ar = {11,55,77,22,33,44,66};//假设最大最小int max = ar[0];int min = ar[0];System.out.println(ar.length);for(int i=0; i<ar.length; i++){if(ar[i] > max){max = ar[i];}else if (ar[i] < min) {min = ar[i];}}System.out.println(“最大值”+ max + “最小值” + min);}}
package xuexi;import java.util.Random;public class ceshi2 {public static void main(String[] args) {//声明数组int[][] ar = null;ar = new int[3][3];//简写 int[][] ar = new int[3][3];int[][] arr = {{10,11,12,13,14},{22,23,24,25,26}};System.out.println(arr[0][0]);System.out.println(arr[1][0]);System.out.print(arr[0][1]);}}package xuexi;import java.util.Random;public class ceshi2 {public static void main(String[] args) {//声明数组int[][] ar = null;ar = new int[3][3];//简写 int[][] ar = new int[3][3];int[][] arr = {{10,11,12,13,14},{22,23,24,25,26}};//分配内存arr[0] = new int[5];arr[1] = new int[5];System.out.println(arr[0][0]);System.out.println(arr[1][0]);System.out.print(arr[0][1]);}}package xuexi;import java.util.Random;public class ceshi2 { public static void main(String[] args) { //声明数组 int[][] ar = null; ar = new int[3][3]; //简写 int[][] ar = new int[3][3]; int[][] arr = { {10,11,12,13,14}, {22,23,24,25,26} }; //分配内存/* arr[0] = new int[5]; arr[1] = new int[5]; System.out.println(arr[0][0]); System.out.println(arr[1][0]); System.out.print(arr[0][1]);*/ /* System.out.println(arr[0].length); System.out.println(arr[1].length);*/ for(int i=0; i < arr.length; i++){/* for(int j=0; j < arr[1].length; j++){ }*//* System.out.print(“第”+ i + “的成绩为:”); for(int j=0; j<arr[i].length; j++){ //System.out.println(”  ” + j); System.out.print(arr[i][j] + ” “); sum += num[i][j]; } System.out.println();*/ int num=0; int[][][] aa={ {{11,22},{33,44}}, {{99,88},{77,66}} }; for(int c=0; c<aa.length; ++c){ for(int j=0; j<aa[c].length; ++j){ for(int k=0; k<aa[j].length; ++k){ System.out.println(“[” + i + “]” + “[” + j + “]” + “[” + k + “]”); num +=aa[c][j][k]; } } } System.out.println(num); } }}

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