一、if和switch语句代码如下
package com.wujianbo;
import java.util.Scanner;
public class Demo06 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Demo06 demo06= new Demo06();
//demo06.branch();
demo06.execif();
}
public void execif(){
Scanner sc= new Scanner(System.in);
System.out.println("请输入年龄：");
int age= sc.nextInt();
if (age <= 20) {
System.out.println("您好，骚年！");
}
else if (age <= 40) {
System.out.println("您好，大哥！");
}
else if (age <= 60) {
System.out.println("您好，大叔！");
}
else {
System.out.println("您好，大爷！");
}
if (age == 45) {
System.out.println("您好，强哥！");
}
}
}
package com.wujianbo;
import java.util.Date;
import java.util.Scanner;
public class Demo06 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Demo06 demo06= new Demo06();
//demo06.branch();
//demo06.execif();
demo06.execcase();
}
public void execcase(){
String x="";
int d= new Date().getDate();
System.out.println(d+"a");
switch (d) {
case 0:
x = "今天是星期一";
break;
case 1:
x = "今天是星期一";
break;
case 2:
x = "今天是星期一";
break;
case 3:
x = "今天是星期一";
break;
case 4:
x = "今天是星期一";
break;
case 5:
x = "今天是星期一";
break;
case 6:
x = "今天是星期一";
break;
case 25:
x = "今天是星期七";
break;
}
System.out.println(x);
}
}
二、for、while、do while的代码如下
public void exeFor(){
int result= 0;
//for (int i=1; i<=100; i++) {
//result += i;
//}
int i= 1;
for (; i<=100 ;) {
result += i;
i++;
}
System.out.println(result);
}
public void exeWhile() {
int i= 1;
int result= 0;
while (i<101) {
result += i;
i++;
}
System.out.println(result);
}
public void exeDowhile() {
int i= 1;
int result= 0;
do {
result += i;
i++;
}while (i<101);
System.out.println(result);
}
