这是我第一个Package 包相关类的测试例子,分为三部分:MainTest 、PackageSecond 和PackageSub
1。MainTest
路径:PackageTest\com\xzm\maintest
package com.xzm.maintest;
import com.xzm.pksub.*; import com.xzm.pksecond.*;
public class Main { public static void main(String[] args) { PackageSecond second = new PackageSecond("I am in Main"); second.printvalue();
PackageSub sub = new PackageSub("I am in Main"); sub.printvalue();
System.exit(0); } }
2。PackageSecond
路径:PackageTest\com\xzm\pksecond
package com.xzm.pksecond;
public class PackageSecond { private String value;
public PackageSecond(String s) { value = s; }
public void printvalue() { System.out.println("value of PackageSecond is " + value); } }
3。PackageSub
路径:PackageTest\com\xzm\pksub
package com.xzm.pksub;
import com.xzm.pksecond.*;
public class PackageSub { private String value;
public PackageSub(String s) { value = s; }
public void printvalue() { PackageSecond second = new PackageSecond("I am in subpackage."); second.printvalue();
System.out.println("value of PackageSub is " + value); }
}

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