Answer Posted / suresh

HashMap hm=new HashMap();
hm.put("1","11");
hm.put("2","22");
hm.put("3","33");
hm.put("4","242");
hm.put(null,null);
hm.put(null,null);
HashMap also allow more null values

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554

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Draw a UML class diagram for the code fragment given below: public class StringApplet extends Applet { private Label sampleString; private Button showTheString; private ButtonHandler bHandler; private FlowLayout layout; public StringApplet() { sampleString = new Label(" "); showTheString = new Button (" Show the String"); bHandler = new ButtonHandler(); layout = new FlowLayout(); showTheString.addActionListener(bHandler); setLayout(layout); add(sampleString); add(showTheString); } class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { samplestring.setText("Good Morning"); } } } Note: The methods need not be indicated on the diagram.

1586

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What is the escape character in java?

509

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623

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What is json parser in java?

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