How to add image in Action page

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Java

JavaSE

J2EE

Hi, this is code which I have written. for this code I need to add a image. So how do it.
Actually I tried in one manner. But its accepting as a string so please help in this.

String units;
for (Object object : list) {
	LiveParam liveParam = new LiveParam();
	Object data[] = (Object[]) object;

	// liveParam.setPramCode(data[0].toString());
	liveParam.setPramDispName(data[0].toString());

	// because of UI use issues i make it this
	double parValue = Double.parseDouble(data[1].toString());

	int iValue = 0;
	units = data[5].toString();
	if ((parValue * 100) % 100 == 0) {
		iValue = (int) parValue;
		if (units.equals("STATUSONOFF")) {
			if (iValue == 0) {
				liveParam.setPramValue("<img src='images/off.gif'/>");
				liveParam.setUnits("OFF");
			} else {
				liveParam.setPramValue("<img src='images/on.gif'/>");
				liveParam.setUnits("ON");

			}
		} else if (units.equals("STATUSYESNO")) {
			if (iValue == 0) {
				liveParam.setPramValue("<img src='image/off.gif'/>");
				liveParam.setUnits("NO");
			} else {
				liveParam.setPramValue("<img src='image/on.gif'/>");
				liveParam.setUnits("YES");
			}
		} else {
			liveParam.setPramValue(iValue+"");
			liveParam.setUnits(units);
		}
	} else {
		liveParam.setPramValue(parValue + "");
		liveParam.setUnits(units);
	}

	

	liveParam.setPramType(data[2].toString());
	liveParam.setTimestamp(Utility.getFormattedTimeStamp(
			(Timestamp) data[3], Constants.DATE_TIME_FORMAT));
	liveParam.setCommunicationMedia(data[4].toString());
	liveparamList.add(liveParam);

}

In the above code I have added images. But its accepting as string. I'll be waiting for your answer