List of usage examples for java.lang Integer Integer
@Deprecated(since = "9") public Integer(String s) throws NumberFormatException
From source file:Counter.java
public static void main(String[] args) { Map hm = new HashMap(); for (int i = 0; i < 10000; i++) { // Produce a number between 0 and 20: Integer r = new Integer(rand.nextInt(20)); if (hm.containsKey(r)) ((Counter) hm.get(r)).i++;/*from w ww. j a v a2 s . c om*/ else hm.put(r, new Counter()); } System.out.println(hm); }
From source file:MainClass.java
public static void main(String[] args) { if (args.length != 2) { String err = "Usage: KeyGeneratorApp algorithmName keySize"; System.out.println(err);//from w w w . j ava2 s . c om System.exit(0); } int keySize = (new Integer(args[1])).intValue(); SecretKey skey = null; KeyPair keys = null; String algorithm = args[0]; try { KeyPairGenerator kpg = KeyPairGenerator.getInstance(algorithm); kpg.initialize(keySize); keys = kpg.genKeyPair(); } catch (NoSuchAlgorithmException ex1) { try { KeyGenerator kg = KeyGenerator.getInstance(algorithm); kg.init(keySize); skey = kg.generateKey(); } catch (NoSuchAlgorithmException ex2) { System.out.println("Algorithm not supported: " + algorithm); System.exit(0); } } }
From source file:Main.java
public static void main(String[] argv) throws Exception { Boolean refBoolean = new Boolean(true); boolean bool = refBoolean.booleanValue(); Byte refByte = new Byte((byte) 123); byte b = refByte.byteValue(); Character refChar = new Character('x'); char c = refChar.charValue(); Short refShort = new Short((short) 123); short s = refShort.shortValue(); Integer refInt = new Integer(123); int i = refInt.intValue(); Long refLong = new Long(123L); long l = refLong.longValue(); Float refFloat = new Float(12.3F); float f = refFloat.floatValue(); Double refDouble = new Double(12.3D); double d = refDouble.doubleValue(); }
From source file:Main.java
public static void main(String[] argv) throws Exception { Object o = new MyBean(); // Get the value of prop2 Expression expr = new Expression(o, "getProp2", new Object[0]); expr.execute();// w w w. ja v a 2s . co m int i = ((Integer) expr.getValue()).intValue(); // Set the value of prop2 Statement stmt = new Statement(o, "setProp2", new Object[] { new Integer(123) }); stmt.execute(); }
From source file:MultiArray1.java
public static void main(String args[]) { // int array[][] = {{1,2,3}, {4,5,6}, {7,8,9}}; // int []array[] = {{1,2,3}, {4,5,6}, {7,8,9}}; // System.out.println(array[0][0]); // System.out.println(array[1][0]); // System.out.println(array[2][0]); // System.out.println([0][0]array); // System.out.println([1][0]array); // System.out.println([2][0]array); Object events[][] = { { new Integer(1452), new String("Italy") }, { new Integer(1472), new String("b.jpg") }, { new Integer(1483), new String("Hr") }, { new Integer(1495), new String("Pte") }, { new Integer(1503), new String("m.jpg") }, { new Integer(1519), new String("F") } }; }
From source file:Main.java
public static void main(String[] argv) throws Exception { JSpinner spinner = new JSpinner(); // Disable keyboard edits in the spinner JFormattedTextField tf = ((JSpinner.DefaultEditor) spinner.getEditor()).getTextField(); tf.setEditable(false);// ww w.ja v a 2 s .co m tf.setBackground(Color.white); // The value of the spinner can still be programmatically changed spinner.setValue(new Integer(100)); }
From source file:MainClass.java
public static void main(String args[]) throws Exception { FileWriter fw = new FileWriter(args[0]); BufferedWriter bw = new BufferedWriter(fw); PrintWriter pw = new PrintWriter(bw, false); pw.println(true);// w w w .jav a 2 s. c o m pw.println('A'); pw.println(500); pw.println(40000L); pw.println(45.67f); pw.println(45.67); pw.println("Hello"); pw.println(new Integer("99")); pw.close(); }
From source file:LazySample.java
public static void main(String args[]) { JFrame frame = new JFrame("Lazy Example"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Integer fifteen = new Integer(15); Object lazyArgs[] = new Object[] { Color.GREEN, Boolean.TRUE, fifteen, fifteen }; Object lazyDiamond = new UIDefaults.ProxyLazyValue("MyIcon", lazyArgs); UIManager.put("Tree.openIcon", lazyDiamond); JTree tree = new JTree(); JScrollPane scrollPane = new JScrollPane(tree); frame.add(scrollPane, BorderLayout.CENTER); frame.setSize(200, 200);// ww w . j a v a 2 s .co m frame.setVisible(true); }
From source file:MainClass.java
public static void main(String args[]) { try {//from w w w.j a va 2 s . c o m PrintWriter pw = new PrintWriter(System.out); // Experiment with some methods pw.println(true); pw.println('A'); pw.println(500); pw.println(40000L); pw.println(45.67f); pw.println(45.67); pw.println("Hello"); pw.println(new Integer("99")); // Close print writer pw.close(); } catch (Exception e) { System.out.println("Exception: " + e); } }
From source file:MemoryDemo.java
public static void main(String args[]) { Runtime r = Runtime.getRuntime(); long mem1, mem2; Integer someints[] = new Integer[1000]; System.out.println("Total memory is: " + r.totalMemory()); mem1 = r.freeMemory();/*from w w w.j a v a 2 s.c o m*/ System.out.println("Initial free memory: " + mem1); r.gc(); mem1 = r.freeMemory(); System.out.println("Free memory after garbage collection: " + mem1); for (int i = 0; i < 1000; i++) someints[i] = new Integer(i); // allocate integers mem2 = r.freeMemory(); System.out.println("Free memory after allocation: " + mem2); System.out.println("Memory used by allocation: " + (mem1 - mem2)); for (int i = 0; i < 1000; i++) someints[i] = null; r.gc(); // request garbage collection mem2 = r.freeMemory(); System.out.println("Free memory after collecting" + " discarded Integers: " + mem2); }