Jcreator4的问题？？
//filename:people_test.java
//定义people类
class people{
public people(){
height = 0;
weight = 0;
}
public double height,weight;
public void speak_hello(){
System.out.println( "Hello! ");
}
public void average_height(){
System.out.println(height);
}
public void average_weight(){
System.out.println(weight);
}
}
//定义China_people
class China_people extends people{
public void China_gongfu(){
System.out.println( "坐如钟，站如松，睡如弓 ");
}
public void speak_hello(){
System.out.println( "你好，吃饭了吗 ");
}
public void average_height(){
this.height = 173.0;
System.out.println( "中国人的平均身高: "+height+ "厘米 ");
}
public void average_weight(){
this.weight = 67.34;
System.out.println( "中国人的平均体重: "+weight+ "公斤 ");
}
}
//定义American_people
class American_people extends people{
public void American_boxing(){
System.out.println( "直拳、钩拳 ");
}
public void speak_hello(){
System.out.println( "How do you do ! ");
}
public void average_height(){
this.height = 188.0;
System.out.println( "American average height: "+height+ " cm ");
}
public void average_weight(){
this.weight = 80.23;
System.out.println( "American average weight: "+weight+ " kg ");
}
}
//定义Beijing_people
class Beijing_people extends people{
public void Beijin_opera(){
System.out.println( "京剧术语 ");
}
public void speak_hello(){
System.out.println( "您好 ");
}
public void average_height(){
this.height = 176.0;
System.out.println( "北京人的平均身高: "+height+ "厘米 ");
}
public void average_weight(){
this.weight = 67.0;
System.out.println( "北京人的平均体重: "+weight+ "公斤 ");
}
}
//主类
public class people_test {
public static void main(String[] args) {
China_people cp = new China_people();
American_people ap = new American_people();
Beijing_people bp = new Beijing_people();
cp.speak_hello();
ap.speak_hello();
bp.speak_hello();
cp.average_height();
ap.average_height();
bp.average_height();
cp.average_weight();
ap.average_weight();
bp.average_weight();
cp.China_gongfu();
ap.American_boxing();
bp.Beijin_opera();
}
}
==========================================================
为什么多次编译有不同的结果？？（多次出现，非偶然）
在csdn搜了一下好像很多人都遇到过结果1的情况，请高手解释一下
结果1（错误）
--------------------Configuration: <Default> --------------------
java.lang.NoSuchMethodError: main
Exception in thread "main "
Process completed.
结果2（正确）
--------------------Configuration: <Default> --------------------
你好，吃饭了吗
How do you do !
您好
中国人的平均身高:173.0厘米
American average height: 188.0 cm
北京人的平均身高:176.0厘米
中国人的平均体重:67.34公斤
American average weight: 80.23 kg
北京人的平均体重:67.0公斤
坐如钟，站如松，睡如弓
直拳、钩拳
京剧术语
Process completed.
=============================================================
如果结果中文出现乱码请先参照下面：
JCreator 4中文设置：
菜单：Configure --> Options --> JDK Tools --> Compiler，选中 <Default> ，然后选Edit，Parameters里面，最前面添加：-encoding UTF-8。
Parameters原来的默认值为：-classpath "$[ClassPath] " -d "$[OutputPath] " $[ModJavaFiles]
修改后为：
-encoding UTF-8 -classpath "$[ClassPath] " -d "$[OutputPath] " $[ModJavaFiles]
[解决办法]
不好意思，是类名首字母应该大写，还有方法名首单词小写，第二个单词开始要大写首字母。。。随便一本java教材应该都有提及到。。。
你建立的是不是一个project？如果是project的话点击execute project应该不会出错的，如果不是project的话所execute的file必须是people_test，如果你是在people下点击execute file的话就会出现找不到main方法的error~
