java命令行参数

javac TestCommandParam.java

java TestCommandParam hello atguigu world

public class DemoParam { public static void main(String[] args) { int[] arr = {10, 20}; method(arr); System.out.println(arr[0]); // 20 System.out.println(arr[1]); // 40 }

public static void method(int[] arr) {
  arr[0]+=10;
  arr[1]+=20;
  System.out.println(arr[0]); // 20
  System.out.println(arr[1]); // 40
}

}

public class TestCommandParam { public static void main(String[] args) { for(int i = 0) } }

java TestCommandParam

java TestCommandParam 1 2 3

java TestCommandParam hello atguigu