打开eclipse并进入如下界面（具体方法详看我的前一个博客，即：用eclipse开发程序：实现输出Hello world!）
然后在下图中打方框的位置第3行开始输入代码
具体代码为
public class HelloWorld{
public static void main(String[] args){
System.out.println(“true,I am a dev,and can program.”);
}
}
或者
public class HelloWorld{
public static void main(String[] args){
System.out.print(“true,”);
System.out.print(“I”);
System.out.print(" am");
System.out.print(" a");
System.out.print(" dev,");
System.out.print(" and");
System.out.print(" can");
System.out.print(" program.");
更麻烦点可以是
public class HelloWorld{
public static void main(String[] args){
System.out.print(“t”);
System.out.print(“r”);
System.out.print(“u”);
System.out.print(“e”);
System.out.print(",");
System.out.print(“I”);
System.out.print(" “);
System.out.print(“a”);
System.out.print(“m”);
System.out.print(” “);
System.out.print(“a”);
System.out.print(” “);
System.out.print(“d”);
System.out.print(“e”);
System.out.print(“v”);
System.out.print(”,");
System.out.print(“a”);
System.out.print(“n”);
System.out.print(“d”);
System.out.print(" “);
System.out.print(“c”);
System.out.print(“a”);
System.out.print(“n”);
System.out.print(” “);
System.out.print(“p”);
System.out.print(“r”);
System.out.print(“o”);
System.out.print(“g”);
System.out.print(“r”);
System.out.print(“a”);
System.out.print(“m”);
System.out.print(”.");
}
}