java 控制执行流

public class WhileTest {
static boolean condition() {
boolean result = Math.random()<0.5;
System.out.print(result+ ",");
return result;
}
public static void main(String[] args) {
while(condition())
System.out.println("Inside 'while'");
System.out.println("Exited 'while'");
}
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
import java.util.*;
import static net.mindview.util.Print.*;

public class VowelsAndConsonants {
public static void main(String[] args) {
Random rand= new Random(47);
for(int i=0;i<5;i++){
int c = rand.nextInt(26)+'a';
printnb((char)c +"," +c+ ";");
switch(c) {
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':print("vowel");
         break;
case 'y':
case 'w':print("Sometimes a vowel");
         break;
default: print("consonant");
}
}
}
}/*
E:\java>java VowelsAndConsonants
y,121;Sometimes a vowel
n,110;consonant
z,122;consonant
b,98;consonant
r,114;consonant
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
foreach
package javat;
import java.util.*;
public class ForEachFloat {

        public static void main(String[] args) {
              Random rand= new Random();
               float f[]=new float[10];
               for( int i=0;i<10;i++)
                     f[i]=rand.nextFloat();
              System. out.print(rand);
               for(float x:f)
                     System. out.println(x);
       }

}
/*Inside main()
Mug(1)
Mug(2)
mug1 & mug2 initialized
Mugs()
new Mugs() completed
Mug(1)
Mug(2)
mug1 & mug2 initialized
Mugs(int)
new Mugs(1) completed
*///..