<zk>
	<window apply="org.zkoss.bind.BindComposer"
		viewModel="@id('vm')@init('test.TestVM')">
		<label value="@load(vm.text)"/>
		<label value="@load(vm.text_a)"/>
	</window>
</zk>

package test;

public class TestVM {
	
	private String text;
	private String text_a;
	
	public String getText() {
		return text;
	}
	
	public String getText_a() {
		return text_a;
	}

	public void setText(String text) {
		this.text = text;
	}
}