depths java classes.java

depths java classes.java

package com.y.d1;

import com.y.d2.Depth2;

public class Depth1 {

	public String call(String x){
		Depth2 d2 = new Depth2();
		return "data service " + d2.call(x);
	}
}

===============================================
package com.y.d2;

import com.y.d3.Depth3;

public class Depth2 {

	public String call(String x){
		Depth3 d3 = new Depth3();
		return "depth2 " + d3.call(x);
	}
}
==========================================
package com.y.d3;

public class Depth3 {

	public String call(String x){
		return "depth3 " + x;
	}
}