example.java

来自「180个针对Java初学者的简单实例,包含了180個適合與初學者的源碼實例」· Java 代码 · 共 15 行

/*
   Here is another short example.
   Call this file "Example.java".
*/
class Example {
  public static void main(String args[]) {
    int num; // this declares a variable called num
    num = 100; // this assigns num the value 100
    System.out.println("This is num: " + num);
    num = num * 2;
    System.out.print("The value of num * 2 is ");
    System.out.println(num);
  }
}