public class HelloWorld {
public static void main(String[] args) {
int m = 180 ;
int n = 200 ;
boolean b = m == n ? true : false ;
System.out.println("b:" + b );
}
}
三个僧人
public class HelloWorld {
public static void main(String[] args) {
int a =150 ;
int b = 165 ;
int c = 210 ;
int zhonghight =a > b ? a : b ;
int max = zhonghight > c ? zhonghight : c ;
System.out.println("max:" + max );
}
}
数据输入Scanner
import java . util . Scanner ;
public class HelloWorld {
public static void main (String[] args) {
Scanner m = new Scanner (System. in );
int n = m . nextInt ( ) ;
System . out . println ("n:" + n ) ;
}
}
三个僧人升级版
import java . util . Scanner ;
public class HelloWorld {
public static void main ( String [] args) {
Scanner sc = new Scanner ( System . in ) ;
int height1 = sc. nextInt ( ) ;
int height2 = sc. nextInt ( ) ;
int height3 = sc. nextInt ( ) ;
int tempHeight = height1 > height2 ? height1 : height2 ;
int maxHeight = tempHeight > height3 ? tempHeight : height3 ;
System . out . println ( maxHeight + "cm" ) ;
}
}
if语句格式一
public class HelloWorld {
public static void main (String[] args) {
System . out . println ("Begin") ;
int a = 10 ;
int b = 20 ;
int c = 10 ;
if ( a == b ) {
System . out . println ( " a = b ") ;
}
if ( a == c ) {
System . out . println ( " a = c ") ;
}
System . out . println ( " Over ") ;
}
}
if else语句
public class HelloWorld {
public static void main (String[] args) {
System . out . println ("Begin") ;
int a = 10 ;
int b = 20 ;
if ( a == b ) {
System . out . println ( " a = b ") ;
}
else {
System . out . println ( " a/=b ") ;
}
System . out . println ( " Over ") ;
}
用if else区分奇数偶数
import java . util . Scanner ;
public class HelloWorld {
public static void main ( String [] args ) {
Scanner sc = new Scanner ( System . in ) ;
System . out . println ( "QingShuRuYiGeZhengShu " ) ;
int number = sc . nextInt ( ) ;
if ( number % 2 == 0 ) {
System . out . println ( " OuShu ") ;
} else {
System . out . println ( "JiShu " ) ;
}
}
if语句三
import java . util . Scanner ;
public class HelloWorld {
public static void main (String [ ] args) {
System . out . println ("Begin") ;
Scanner sc = new Scanner (System . in ) ;
System . out . println ("ShuRuYiGeXingQiShu") ;
int week = sc . nextInt ( ) ;
if ( week == 1 ) {
System . out . println ("ZhouYi");
} else if (week == 2) {
System . out . println ("ZhouEr");
} else if (week == 3) {
System . out . println ("ZhouSan");
} else if (week == 4) {
System . out . println ("ZhouSi");
} else if (week == 5) {
System . out . println ("ZhouWu");
} else if (week == 6) {
System . out . println ("ZhouLiu");
} else {
System . out . println ("ZhouRi");
}
System . out . println ("Over") ;
}
}
分数（要有可推敲性）
import java . util . Scanner ;
public class HelloWorld {
public static void main (String [ ] args) {
System . out . println ("Begin") ;
Scanner sc = new Scanner (System . in ) ;
System . out . println ("ShuRuYiGeFenShu") ;
int score = sc . nextInt ( ) ;
if (score >100|| score <0) {
System . out . println ("error");
} else if (score<=94 && score>=90) {
System . out . println ("entaintment");
} else if (score>=95 && score<=100) {
System . out . println ("Bycile");
} else if (score<=89 && score>=80) {
System . out . println ("Bianxing");
} else {
System . out . println ("Bit");
}
System . out . println ("Over");
}
}
用swtich语句做周一到周日
import java . util . Scanner ;
public class HelloWorld {
public static void main (String [ ] args) {
System . out . println ("Begin") ;
Scanner sc = new Scanner (System . in ) ;
System . out . println ("ShuRuYiGeXingQiShu") ;
int week = sc . nextInt ( ) ;
switch (week){
case 1 :
System . out . println("ZhouYi");
break;
case 2 :
System . out . println("ZhouEr");
break;
case 3 :
System . out . println("ZhouSan");
break;
case 4 :
System . out . println("ZhouSi");
break;
case 5 :
System . out . println("ZhouWu");
break;
case 6 :
System . out . println("ZhouLiu");
break;
case 7 :
System . out . println("ZhouRi");
break;
default :
System . out . println("Error");
}
System . out . println("Over");
}
}
case穿透
import java . util . Scanner ;
public class HelloWorld {
public static void main (String [ ] args) {
System . out . println ("Begin") ;
Scanner sc = new Scanner (System . in ) ;
System . out . println ("ShuRuYiGeXingQiShu") ;
int number = sc . nextInt ( ) ;
switch (number){
case 3:
case 4:
case 5:
System . out . println("Chun");
break;
case 6 :
case 7:
case 8:
System . out . println("Xia");
break;
case 9 :
case 10:
case 11:
System . out . println("Qiu");
break;
case 1 :
cas
