F945464的博客

package lianxi;import java.util.*;public class Test37{ public static void main(String[] args){ Scanner s = new Scanner(System.in); String ss = s.next(); if(huiwen(ss)) System.out.println("是回文字符串"); else System.out.println("不是是回文字符串"); } publi.

package lianxi;import java.util.*;public class Test6{ public static void main(String[] args){ System.out.print("请输入一个整数:"); Scanner s = new Scanner(System.in); int n = s.nextInt(); a1(n); } public static void a1(int n){ for(int i = .

package lianxi;public class Test7{ public static void main(String[] args){ int a = 0; for(int i = 1;i<=100;i++){ if(a1(i)){//返回值是 代表这个整数是否是质数 System.out.println(i+"是质数"); a++; } } System.out.println(a+"个"); } //判断一个整数是否是质数.

package demo;import java.util.*;public class Arrays1{ public static void main(String[] args){ int[] a = {1,2,3,4,5,6}; Arrays.sort(a); /* 冒泡排序法.相邻的两个元素比较每次找出最大的数 for(int i = 0 ; i<a.length - 1; i++){ for(int j = 0 ; j <a.length -1-.

package demo;public class TestArraySort2{ public static void main(String[] args){ //选择排序法 一个元素 和 其他所有元素比较 int[] a = {8,5,4,3,7,2}; /* 0 1 2 3 4 5 8 5 4 3 7 2 0-1 5 8 4 3 7 2 i=0 0-2 4 8 5 3 7 2 j=1;j<6;j++ 0-3 3 8 5 4 7 2.

package demo;public class TestArraySort{ public static void main(String[] args){ int[] a = {8,5,4,3,7,2}; //冒泡排序法 相邻的元素比较每次找处最大的数. /* 0 1 2 3 4 5 n=6 长度a.length n = a.length =6 8 5 4 3 7 2 循环 i = 0 ; i < a..

package demo;public class TestArrayExpand{ public static void main(String[] args){ //数组的扩充. int[] a = {1,2,3,4,5}; int[] b = new int[a.length*2]; for(int i = 0; i < a.length; i++){ b[i] = a[i]; } System.out.println(a.length); a = b;.

package demo;public class TestVarArgs{ public static void main(String[] args){ System.out.println(add()); System.out.println(add(4,3,2,5)); System.out.println(add(43,5)); System.out.println(add(435,6,6787,6)); System.out.println(add(3,5,6765,5.

package demo;public class TestFunctionLianXi{ public static void main(String[] args){ sum(1,1); hello(); result(); resultOushu(); result1(); result2(); a(); } public static void sum(int a , int b){ System.out.println(a+b); }//函数用于.