Node.java import java.util.HashMap; import java.util.Map; import java.util.Properties; public abstract class Node { private String type; private Map properties = new HashMap<>(); public Node(String type) { this.type = type; }
Node.java import java.util.HashMap; import java.util.Map; import java.util.Properties; public abstract class Node { private String type; private Map properties = new HashMap<>(); public Node(String type) { this.type = type; }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Below is Node.java and ProgramNode.java. There is an error in ProgramNode.java, so make sure to fix that error and show the fixed code with the screenshot of the working code.
Node.java
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
public abstract class Node {
private String type;
private Map<String, String> properties = new HashMap<>();
public Node(String type) {
this.type = type;
}
public String getType() {
return type;
}
public void addProperty(String key, String value) {
properties.put(key, value);
}
public String getProperty(String key) {
return properties.get(key);
}
public String ToString() {
return null;
}
}
ProgramNode.java
import javax.swing.ActionMap;
public class ProgramNode extends Node {
private String programName;
private int programId;
public ProgramNode(String programName, int programId) {
this.programName = programName;
this.programId = programId;
}
@Override
public String ToString() {
return "ProgramNode{" +
"programName='" + programName + '\'' +
", programId=" + programId +
'}';
}
}
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There is an error for type in ProgramNode.java. Please fix the error and show the fixed code for ProgramNode.java with the screenshot of the working code.
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