while 循环

while(condition){       //xxx}

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for循环

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

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do{    //xxxx}while(condition);int x = 10;      do {         System.out.print("value of x : " + x );         x++;         System.out.print("\n");      }while( x < 20 );

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循环控制声明

break

int [] numbers = {10, 20, 30, 40, 50};      for(int x : numbers ) {         if( x == 30 ) {            break;         }         System.out.print( x );         System.out.print("\n");      }

continue

int [] numbers = {10, 20, 30, 40, 50};      for(int x : numbers ) {         if( x == 30 ) {            continue;         }         System.out.print( x );         System.out.print("\n");      }

java 循环增强

for(declaration : expression) {   // Statements}public class Test {   public static void main(String args[]) {      int [] numbers = {10, 20, 30, 40, 50};      for(int x : numbers ) {         System.out.print( x );         System.out.print(",");      }      System.out.print("\n");      String [] names = {"James", "Larry", "Tom", "Lacy"}; //大括号      for( String name : names ) {         System.out.print( name );         System.out.print(",");      }   }}