boolean flag = Pattern.matches("正規表現","文字列");

Pattern p = Pattern.compile("正規表現");
Matcher m = p.matcher("置換対象文字列");
String result = m.replaceFirst("置換文字列");
String result = m.replaceAll("置換文字列");

Pattern p = Pattern.compile("正規表現");
String[] strs = p.split("置換対象文字列");

import java.util.regex.*;

<applet code="Graph.class" width=400 height=400>
	<param name=center value="joe">
</applet>

List list = new ArrayList();
list.add(new Integer(3));
list.add(new Integer(2));
list.add(new Integer(1));
TreeSet ts = new TreeSet(list);
Iterator it = ts.iterator();

HashMap map = new HashMap();
map.put("2", "じゃいあん");
map.put("1", "のびた");
map.put("3", "しずか");
TreeMap tm = new TreeMap(map);
it = tm.values().iterator();

HashMap map = new HashMap();
map.put("key1", "value1");
map.put("key2", "value2");
map.put("key3", "value3");
map.put("key4", "value4");
map.put("key5", "value5");
TreeMap treeMap = new TreeMap(map);

Set set = treeMap.entrySet();
Iterator it = set.iterator();
while(it.hasNext()) {
	Map.Entry entry = (Map.Entry) it.next();
	System.out.println(entry.getKey());
	System.out.println(entry.getValue());
}

public static String encode(String s, String enc) throws UnsupportedEncodingException

String result = URIEncoder.encode("ほげ", "EUC-JP");

GoogleSearch google=new GoogleSearch();
google.setKey(自分のライセンスキー);
google.setQueryString(検索文字列);
GoogleSearchResult result=google.doSearch();

GoogleSearchResultElement[] element=result.getResultElements();
for (int i=0;i<=element.length-1;i++)
{
	// element[i] の情報を使う
}