Java4android Development Tutorial (ii) Hello World!_android

After installing the JDK environment, write the first Java program Hello.java:

Copy Code code as follows:

public class hello{
public static void Main (String args []) {
System.out.println ("Hello world!");
}
}

The class file appears when the compilation is complete

Attention:

1, the letter after public class and file name corresponding to the case, note the case of characters
2, in pairs appear symbols such as curly braces, parentheses and so on one-time write a pair of
3, Encounter curly braces {} With the TAB key to indent, develop good indentation habits
4, write the source code needs to be compiled into class files
5, in the cmd into the source code in the folder to compile
Javac Hello.java
Java Hello