java 循环控制

while 循环

1while(condition){
2       //xxx
3}

for循环

1for(initialization;expression;update){//注意是分号的
2    //xxxx
3}
4
5
6      for(int x = 10; x < 20; x = x + 1) {
7         System.out.print("value of x : " + x );
8         System.out.print("\n");
9      }

1do{
2    //xxxx
3}while(condition);
4
5int x = 10;
6      do {
7         System.out.print("value of x : " + x );
8         x++;
9         System.out.print("\n");
10      }while( x < 20 );
11
12

循环控制声明 break

1int [] numbers = {10, 20, 30, 40, 50};
2
3      for(int x : numbers ) {
4         if( x == 30 ) {
5            break;
6         }
7         System.out.print( x );
8         System.out.print("\n");
9      }

continue

1int [] numbers = {10, 20, 30, 40, 50};
2
3      for(int x : numbers ) {
4         if( x == 30 ) {
5            continue;
6         }
7         System.out.print( x );
8         System.out.print("\n");
9      }

java 循环增强

1for(declaration : expression) {
2   // Statements
3}
4
5public class Test {
6
7   public static void main(String args[]) {
8      int [] numbers = {10, 20, 30, 40, 50};
9
10      for(int x : numbers ) {
11         System.out.print( x );
12         System.out.print(",");
13      }
14      System.out.print("\n");
15      String [] names = {"James", "Larry", "Tom", "Lacy"}; //大括号
16
17      for( String name : names ) {
18         System.out.print( name );
19         System.out.print(",");
20      }
21   }
22}