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你好，很简短的代码
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package zhengze;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String str = in.next();
if (str.equals("a") str.equals("b")) {
} else if (str.equals("a") || str.equals("b")) {
} else {
}
}
}
希望可以帮助到你
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~
import java.awt.Button;
import java.util.Set;
// 每一个小方块类
public class Diamond extends Button {
private Diamond[] diamonds;
// 该小方块周围的八个方向上的小方块
private Diamond east;
private Diamond north;
private Diamond northEast;
private Diamond northWest;
private Diamond south;
private Diamond southEast;
private Diamond southWest;
private Diamond west;
private boolean isBomb;// 是否是雷
private boolean isChange;// 又没有被翻过
private int no;// 产生的方块的编号
// 持有所有小方块的引用,方便进行操作
public Diamond(Diamond[] diamonds) {
this.diamonds = diamonds;
}
// 按键时方块发生改变
public boolean change() {
this.isChange = true;// 说明已经翻过了
if(isBomb) {// 触雷
//this.setBackground(Color.red);
return true;
} else {// 不是雷,就显示周围雷的数目
//this.setLabel(this.getNearBombNo() + "");
this.setLabel(this.getNearBombNo() + "");
//if(this.getNearBombNo() == 0) {
// this.moveon();
//}
return false;
}
}
// 获得该小方块周围雷的数量
public int getNearBombNo() {
int no = 0;
if(this.northWest != null this.northWest.isBomb) no++;
if(this.north != null this.north.isBomb) no++;
if(this.northEast != null this.northEast.isBomb) no++;
if(this.east != null this.east.isBomb) no++;
if(this.southEast != null this.southEast.isBomb) no++;
if(this.south != null this.south.isBomb) no++;
if(this.southWest != null this.southWest.isBomb) no++;
if(this.west != null this.west.isBomb) no++;
return no;
}
// 获得该小方块周围的小方块
public Diamond getNearDimaond(int i) {
int index = -1;
switch (i) {
case 1:// 1表示西北,2,表示北,以此类推
index = no - 10;
if(index 1 || no == 19 || no == 28 || no == 37 || no == 46 || no == 55 || no == 64 || no == 73) {
return null;
} else {
return diamonds[index];
}
case 2:
index = no - 9;
if(index 1) {
return null;
} else {
return diamonds[index];
}
case 3:
index = no - 8;
if(index 1 || no == 9 || no == 18 || no == 27 || no == 36 || no == 45 || no == 54 || no == 63 || no == 72) {
return null;
} else {
return diamonds[index];
}
case 4:
index = no + 1;
if(no == 9 || no == 18 || no == 27 || no == 36 || no == 45 || no == 54 || no == 63 || no == 72 || no == 81) {
return null;
} else {
return diamonds[index];
}
case 5:
index = no + 10;
if(index = 81 ||no == 9 || no == 18 || no == 27 || no == 36 || no == 45 || no == 54 || no == 63 || no == 72 || no == 81) {
return null;
} else {
return diamonds[index];
}
case 6:
index = no + 9;
if(index 81) {
return null;
} else {
return diamonds[index];
}
case 7:
index = no + 8;
if(index = 81 || no==1 || no == 10 || no == 19 || no == 28 || no == 37 || no == 46 || no == 55 || no == 64 || no == 73) {
return null;
} else {
return diamonds[index];
}
case 8:
index = no - 1;
if(no==1 || no==10 || no == 19 || no == 28 || no == 37 || no == 46 || no == 55 || no == 64 || no == 73) {
return null;
} else {
return diamonds[index];
}
}
return null;
}
// 递归,set是用来装已经翻过的小方块的,不然会死循环,为什么用set,因为set是不重复的
public void moveon(SetDiamond set) {
set.add(this);// 先把自己加上
if(this.getNorthWest() != null this.getNorthWest().isBomb == false) {
this.getNorthWest().change();
if(this.getNorthWest().getNearBombNo() == 0) {
if(set.contains(this.getNorthWest()) == false)
this.getNorthWest().moveon(set);
}
set.add(this.getNorthWest());
}
if(this.getNorth() != null this.getNorth().isBomb == false) {
this.getNorth().change();
if(this.getNorth().getNearBombNo() == 0) {
if(set.contains(this.getNorth()) == false)
this.getNorth().moveon(set);
}
set.add(this.getNorth());
}
if(this.getNorthEast() != null this.getNorthEast().isBomb == false) {
this.getNorthEast().change();
if(this.getNorthEast().getNearBombNo() == 0) {
if(set.contains(this.getNorthEast()) == false)
this.getNorthEast().moveon(set);
}
set.add(this.getNorthEast());
}
if(this.getEast() != null this.getEast().isBomb == false) {
this.getEast().change();
if(this.getEast().getNearBombNo() == 0) {
if(set.contains(this.getEast()) == false)
this.getEast().moveon(set);
}
set.add(this.getEast());
}
if(this.getSouthEast() != null this.getSouthEast().isBomb == false) {
this.getSouthEast().change();
if(this.getSouthEast().getNearBombNo() == 0) {
if(set.contains(this.getSouthEast()) == false)
this.getSouthEast().moveon(set);
}
set.add(this.getSouthEast());
}
if(this.getSouth() != null this.getSouth().isBomb == false) {
this.getSouth().change();
if(this.getSouth().getNearBombNo() == 0) {
if(set.contains(this.getSouth()) == false)
this.getSouth().moveon(set);
}
set.add(this.getSouth());
}
if(this.getSouthWest() != null this.getSouthWest().isBomb == false) {
this.getSouthWest().change();
if(this.getSouthWest().getNearBombNo() == 0) {
if(set.contains(this.getSouthWest()) == false)
this.getSouthWest().moveon(set);
}
set.add(this.getSouthWest());
}
if(this.getWest() != null this.getWest().isBomb == false) {
this.getWest().change();
if(this.getWest().getNearBombNo() == 0) {
if(set.contains(this.getWest()) == false)
this.getWest().moveon(set);
}
set.add(this.getWest());
}
}
/*public Diamond[] getDiamonds() {
return diamonds;
}*/
public Diamond getEast() {
return east;
}
public int getNo() {
return no;
}
public Diamond getNorth() {
return north;
}
public Diamond getNorthEast() {
return northEast;
}
public Diamond getNorthWest() {
return northWest;
}
public Diamond getSouth() {
return south;
}
public Diamond getSouthEast() {
return southEast;
}
public Diamond getSouthWest() {
return southWest;
}
public Diamond getWest() {
return west;
}
public boolean isBomb() {
return isBomb;
}
public boolean isChange() {
return isChange;
}
public void setBomb(boolean isBomb) {
this.isBomb = isBomb;
}
public void setChange(boolean isChange) {
this.isChange = isChange;
}
public void setDiamonds(Diamond[] diamonds) {
this.diamonds = diamonds;
}
public void setEast(Diamond east) {
this.east = east;
}
public void setNo(int no) {
this.no = no;
}
public void setNorth(Diamond north) {
this.north = north;
}
public void setNorthEast(Diamond northEast) {
this.northEast = northEast;
}
public void setNorthWest(Diamond northWest) {
this.northWest = northWest;
}
public void setSouth(Diamond south) {
this.south = south;
}
public void setSouthEast(Diamond southEast) {
this.southEast = southEast;
}
public void setSouthWest(Diamond southWest) {
this.southWest = southWest;
}
public void setWest(Diamond west) {
this.west = west;
}
}
public static void main(String[] args) {
//控制台输入
Scanner scan = new Scanner(System.in);
//三次机会
for (int i = 2; i = 0; i--) {
//提示用户输入
System.out.println("请输入用户名");
//用户名
String userName = scan.next();
//提示用户输入
System.out.println("请输入密码");
//密码
String password = scan.next();
//如果输入正确， break,结束循环
if("jim".equals(userName) "123456".equals(password)) {
System.out.println("欢迎登录MyShopping系统");
break;
}
else {
if(i 0) {
System.out.println("密码错误，你还有"+i+"次机会！");
continue;
}
if(i == 0) {
System.out.println("密码错误，三次机会已用完！");
}
}
}
}
写了一个代码，代码如下，可以进行参考
public class sum {
public static void main(String[] args) {
//创建一个Scanner的对象input
Scanner input = new Scanner(System.in);
//提示用户输入数据
System.out.print("请输入一个整数");
//将输入的值赋给n
int n = input.nextInt();
//定义变量接收计算后的和
int sum = 0;
//利用循环进行求和
for (int i = 0; i = n; i++) {
sum+=i;
}
//输出最后的和
System.out.println("从0一直到"+n+"的所有整数的和是:"+sum);
}
}