programcontrol.java

JAVA编程百例书中各章节的所有例子的源代码,包括套接字编程

package ch01.section03;

public class ProgramControl {
  public static void main(String[] args) {
    int i;
    int nSum = 0;
    //for循环
    for (i = 0; i < 3; i++) {
      nSum++;
      System.out.println("当前的for循环变量值" + i + "累加结果" + nSum);
    }
    //while循环
    i = 0;
    while (i != 3) {
      System.out.println("当前的while循环变量i值为" + i);
      i++;
    }
    //do-while循环
    i = 0;
    do {
      System.out.println("当前的do-while循环变量i值为" + i);
      i++;
    }
    while (i == 4);
    //if-else条件分支结构
    if (i == 0) {
      System.out.println("经过do-while循环变量i值为0");
    }
    else if (i == 1) {
      System.out.println("经过do-while循环变量i值为1");
    }
    else if (i == 2) {
      System.out.println("经过do-while循环变量i值为2");
    }
    else if (i == 3) {
      System.out.println("经过do-while循环变量i值为3");
    }
    else {
      System.out.println("经过do-while循环变量i值为4");
    }
  }
}