java升序(java升序排列)
java里升序和降序最简短的代码分别是什么？
直接调用jdk里面的方法Arrays.sort(args)方法。而且这个方法重载实现了多个参数，排序下标[N~M]位数字~倒叙，升序等等~
for (int i = 0; i list.size(); i++) {
for (int j = i + 1; j list.size(); j++) {
if (list.get(i) list.get(j)) {
int temp = list.get(i);
list.set(i, list.get(j));
list.set(j, temp);
}
}
}
System.out.println("升序：" + list);
for (int i = 0; i list.size(); i++) {
for (int j = i + 1; j list.size(); j++) {
if (list.get(i) list.get(j)) {
int temp = list.get(i);
list.set(i, list.get(j));
list.set(j, temp);
}
}
}
System.out.println("降序：" + list);
Java升序降序
import?java.util.*;
public?class?Test?{
????public?static?void?main(String[]?args)?{
????????int?stuNum?=?4;
????????int?classNum?=?3;
????????double[]?score?=?new?double[stuNum];
????????double?sum?=?0;
????????double[]?avgrage?=?new?double[classNum];
????????double[]?arr?=?new?double[classNum?*?stuNum];
????????Scanner?input?=?new?Scanner(System.?in?);
????????for?(int?i?=?0;?i??classNum;?i++)?{
????????????sum?=?0;
????????????System.out.println("请输入第"?+?(i?+?1)?+?"个班级成绩：");
????????????for?(int?j?=?0;?j??score.length;?j++)?{
????????????????System.out.print("第"?+?(j?+?1)?+?"个学员的成绩：");
????????????????double?s?=?input.nextDouble();
????????????????score[j]?=?s;
????????????????sum?+=?s;
????????????????arr[i?*?stuNum?+?j]?=?s;
????????????}
????????????avgrage[i]?=?sum?/?score.length;
????????????System.out.println("第"?+?(i?+?1)?+?"个班级参赛学员的平均分是："?+?avgrage[i]?+?"\n");
????????}
????????input.close();
????????System.out.println("原序:?"?+?Arrays.toString(arr));
????????//升序
????????for?(int?i?=?0;?i??arr.length;?i++)?{
????????????for?(int?j?=?i?+?1;?j??arr.length;?j++)?{
????????????????if?(arr[i]??arr[j])?{
????????????????????double?tmp?=?arr[i];
????????????????????arr[i]?=?arr[j];
????????????????????arr[j]?=?tmp;
????????????????}
????????????}
????????}
????????System.out.println("升序:?"?+?Arrays.toString(arr));
????????//降序
????????for?(int?i?=?0;?i??arr.length;?i++)?{
????????????for?(int?j?=?i?+?1;?j??arr.length;?j++)?{
????????????????if?(arr[i]??arr[j])?{
????????????????????double?tmp?=?arr[i];
????????????????????arr[i]?=?arr[j];
????????????????????arr[j]?=?tmp;
????????????????}
????????????}
????????}
????????System.out.println("降序:?"?+?Arrays.toString(arr));
????}
}
java 输入任意几个数字，怎样将他们从大到小排序？
public static void main(String[] args) {?Scanner scan = new Scanner(System.in)。
}
System.out.println("从大到小输出：");
for (int m = num.length-1; m =0; m--) {
System.out.println(num[m]);//从大到小输出
}
}
String[] str = scan.nextLine().split(" ")，// 输入时以空格隔开数字。
int[] num = new int[str.length];//初始化一个整型数组，长度为你输入数字的个数。
String[] str = scan.nextLine().split(" ");// 输入时以空格隔开数字
int[] num = new int[str.length];//初始化一个整型数组，长度为你输入数字的个数
for (int i = 0; i str.length; i++) {
num[i] = Integer.parseInt(String.valueOf(str[i]));//将字符转换为int型再赋给整型数组
}
Arrays.sort(num);//升序排序
System.out.println("从小到大输出：");
for (int j = 0; j num.length; j++) {
System.out.println(num[j]);//从小到大输出
java 数组升序排列
?public?static?void?main(String?args[])
????{?
???????try
???????{
???????int?i,?sum=0;
???????FileWriter?f_out=new?FileWriter("data.txt");
???????System.out.println("请输入学生的个数");
???????int?n=new?Scanner(System.in).nextInt();
???????int?s[]=new?int?[n];
???????for(?i=0;in;i++)
?????????{
??????????System.out.println("请输入第"+(i+1)+"个学生的成绩");
????????????s[i]=new?Scanner(System.in).nextInt();
????????????if?(s[i]0||s[i]100)
????????????{????????????
????????????System.out.println("输入错误，请重新输入");???????????
????????????s[i]=new?Scanner(System.in).nextInt();
????????????}
????????????
????????????
?????????}
???????Arrays.sort(s);
???????for(int?j=0;jn;j++){
???????f_out.write(s[j]+"\n");??
???????}
f_out.close();
?????????FileReader?f_in=new?FileReader("data.txt");
?????????for(int?c=f_in.read();c!=-1;c=f_in.read())
?????????System.out.print((char)c+"??");
???????
?????????f_in.close();
???????}????
????????catch(IOException?e)
????????{
?????????System.err.println(e);
?????????e.printStackTrace();
????????}??????
????}
这样应该就好了。