JavaBean + builder pattern + telescoping constructor pattern

JavaBean.java

public class JavaBean {
	
	private int channelID;		         // required
	private String channelName;        // required
	private String channelDescription; // optional
	private int channelCategory;       // optional
	
	public void setChannelID(int id) {
		this.channelID = id;
	}
	
	public void setChannelName(String channelName) {
		this.channelName = channelName;
	}
	
	public void setDescription(String channelDescription) {
		this.channelDescription = channelDecription;
	}
	
	public void setChannelCategory(int category) {
		this.channelCategory = category;
	}
}

/* thread unsafe and not required */
JavaBean bean = new JavaBean();
bean.setChannelID(123);
bean.setChannelName("test");
bean.setDescription("test");
bean.setChannelCategory(1);



public class JavaBean {
	
	private final int channelID;		         // required
	private final String channelName;        // required
	private final String channelDescription; // optional
	private final int channelCategory;       // optional
	
	public static class Builder {
		
		private final int channelID;
		private final int channelName;
		private int channelDecription = "";
		private int channelCategory = -1;
		
		public Budiler(int channelID, String channelName) {
			this.channelID = channelID;
			this.channelName = channelName;
		}
		
		public Builder channelDescription(String channelDescription) {
			this.channelDescription = channelDescription;
			return this;
		}
		
		public Builder channelCategory(int channelCategory) {
			this.channelCategory = channelCategory;
			return this;
		}
		
		public JavaBean build() {
			return new JavaBean(this);
		}
	}
	
	private JavaBean(Builder builder) {
		this.channelId = builder.channelID;
		this.channelName = builder.channelName;
		this.channelDescription = builder.channelDescription;
		this.channelCategory = builder.channelCategory;
	}
}

/* JavaBean + builder pattern + telescoping constructor pattern */
/* thread safe */
JavaBean bean = new Builder(123, "test")
	.channelDescription("test")
	.channelCategory(1)
	.build();