java 3.20
作者：互联网
1
package fjh;
import java.util.Scanner;
public class zhc {
private static int x,y;
public static void main(String[] args) {
System.out.println("请输入x:");
Scanner scanner=new Scanner(System.in);
x= scanner.nextInt();
see();
}
public static void see(){
y=x*x+3*x+2;
System.out.println(y);
}
}
2
package fjh;
import java.util.Scanner;
public class zhc3 {
public static void main(String[] args) {
int a,b,c,d;
System.out.println("请输入一个三位数：");
Scanner scanner =new Scanner(System.in);
a=scanner.nextInt();
b=a%10;
c=a/10%10;
d=a/100;
System.out.println("个位:"+b+"十位:"+c+"百位:"+d);
}
}
3
package fjh;
import java.util.Scanner;
public class zhc2 {
public static void main(String[] args) {
float r;
double s,x;
System.out.println("请输入圆的半径r:");
Scanner scanner=new Scanner(System.in);
r=scanner.nextFloat();
s=3.14*r*r;
x=2*3.14*r;
System.out.println("圆的面积"+s+"圆的周长"+x);
}
}
4
package fjh;
import java.util.Scanner;
public class zhc4 {
public static void main(String[] args) {
int a;
String s,y,x;
y="男性";
x="女性";
Scanner scanner =new Scanner(System.in);
s=scanner.next();
a=scanner.nextInt();
if (s.equals(y)){
if (a<=60)
System.out.println("输血量为250毫升");
else System.out.println("输血量为300毫升");
}
else if (s.equals(x)){
if (a<=50) System.out.println("输血量为200毫升");
else System.out.println("输血量为250毫升");
}
}
}
5
package fjh;
import java.util.Scanner;
public class zhc6 {
public static void main(String[] args) {
String a,r,y;
int s,h,w=0;
r="硬座";
y="硬卧";
System.out.println("请输入，票的类型 年龄,和身高,:");
Scanner scanner =new Scanner(System.in);
a=scanner.next();
s=scanner.nextInt();
h=scanner.nextInt();
if (s<18){
if (a.equals(r)){w=100;
if (h<120) w=0;
else if (h>=120&h<150) w=w/2;}
else {w=190;
if (h<120) w=w-50;
else if (h>=120&h<150) w=w-50;
}
}else {if (a.equals(r))w=100;
else w=190;
}
System.out.println("票价为:"+w);
}
}
6
package fjh;
import java.util.Scanner;
public class zhc5 {
public static void main(String[] args) {
int a;
System.out.println("请输入空调的温度:");
Scanner scanner=new Scanner(System.in);
a=scanner.nextInt();
if (a>26)
System.out.println("开启制冷模式");
else if(a<10) System.out.println("开启制热模式");
else System.out.println("开启送风模式");
}
}
7
package fjh;
import java.util.Scanner;
public class zhc7 {
public static void main(String[] args) {
double a, b,d,u,l=0,x;
System.out.println("请输入用电额度:");
Scanner scanner=new Scanner(System.in);
a=scanner.nextDouble();
if (a<=150) {b=0.4463;
l=a*b;
}
else if (a>150&a<=400) {d=0.4663; l=((a-150)*d)+150*0.4463;
}
else if (a>=401) {u=0.5663; l=((a-400)*u+(a-150)*0.4663+(150*0.4463));
}
System.out.println("你的用电量为"+a+"电费为"+l);
}
}
8
package fjh;
import java.util.Scanner;
public class zhc8 {
public static void main(String[] args) {
System.out.println("请输入月份");
int a;
Scanner scanner =new Scanner(System.in);
a=scanner.nextInt();
switch (a){
case 1:
case 2:
case 3:
System.out.println("春天");break;
case 4:
case 5:
case 6:
System.out.println("夏天");break;
case 7:
case 8:
case 9:
System.out.println("秋天");break;
case 10:
case 11:
case 12:
System.out.println("冬天");break;
}
}
}
9
package fjh;
public class zhc9 {
public static void main(String[] args) {
int a=560,b,c;
b=560/60;
c=560%60;
System.out.println("560分钟是:"+b+"小时"+c+"分钟");
}
}
10
package fjh;
import java.util.Scanner;
public class zhc10 {
public static void main(String[] args) {
//输入三个整数A、B和C，将它们交换（即A的值给B，B的值给C，C的值给A）后输出A、B和C。
int a,b,c,t,x;
System.out.println("输入三个数ABC:");
Scanner scanner =new Scanner(System.in);
a=scanner.nextInt();
b=scanner.nextInt();
c=scanner.nextInt();
System.out.println("没更换之前这三个数是"+"A:"+a+ "B:"+b+ "C:"+c);
t=b;
b=a;
x=c;
c=t;
a=c;
System.out.println("更换之后这三个数是"+"A:"+a+"B:"+b+ "C:"+c);
}
}
标签：scanner,java,Scanner,System,3.20,println,public,out 来源： https://www.cnblogs.com/fjh1/p/16033122.html