variantscopedemo.java

Eclipse程序设计经典教程+源代码 学习java的朋友可以看看

package variant;

public class VariantScopeDemo {
  //创建类变量
  LocalVariant localVariant1 = new LocalVariant();
  PublicVariant publicVariant1 = new PublicVariant();
  PackageVariant packageVariant1 = new PackageVariant();
  
  public VariantScopeDemo(){
    System.out.println("publicVariant1类的str1变量 = " + publicVariant1.str1);
    System.out.println("localVariant1类的str1变量 = " + localVariant1.getStr());
    System.out.println("packageVariant1类的str1变量 = " + packageVariant1.str1);
  }

  public static void main(String[] args) {
    new VariantScopeDemo();
  }
}

class LocalVariant {
  //创建本地变量
  private String str1 = "本地变量";
  //返回本地变量，不能直接访问，可以通过getStr方法取得str1的变量值
  public String getStr(){
    //tempStr是方法变量
    String tempStr = str1;
    return tempStr;
  }
  
}

class PublicVariant {
  //创建公共变量
  public String str1 = "公共变量";
}

class PackageVariant {
  //创建同目录变量
  public String str1 = "同目录变量";
}