package com.bjpowernode.demo04;
public class Test01 {
public static void main(String[] args) {
m1("abc");
m1(123);
}
public static void m1( Object obj) {
}
}
package com.bjpowernode.demo04;
public class Test02 {
public static void main(String[] args) {
Integer i1 = new Integer(123);
Double dd1 = new Double(45.78);
Boolean bb1 = new Boolean(true);
Integer i2 = new Integer("456123");
System.out.println( i2 );
Double dd2 = new Double("45.78");
dd2 = new Double("456");
Boolean bb2 = new Boolean("true");
System.out.println( bb2 );
bb2 = new Boolean("trasdfaffdue");
System.out.println( bb2 );
bb2 = new Boolean( null );
System.out.println( bb2 );
}
}
package com.bjpowernode.demo04;
public class Test03 {
public static void main(String[] args) {
System.out.println( Integer.SIZE);
System.out.println( Integer.BYTES);
System.out.println( Integer.MIN_VALUE);
System.out.println( Integer.MAX_VALUE);
System.out.println( Integer.TYPE);
System.out.println( Boolean.TYPE);
System.out.println( Boolean.TRUE);
System.out.println( Boolean.FALSE);
System.out.println( Double.NaN);
System.out.println( Double.POSITIVE_INFINITY);
System.out.println( Double.NEGATIVE_INFINITY);
System.out.println( 10 / 0.0 );
System.out.println( -10 / 0.0 );
System.out.println( 0 / 0.0 );
}
}
package com.bjpowernode.demo04;
public class Test04 {
public static void main(String[] args) {
Integer i1 = new Integer(456);
Integer i2 = new Integer("123");
byte bb = i2.byteValue();
double dd = i1.doubleValue();
System.out.println( bb );
System.out.println( dd );
bb = i1.byteValue();
System.out.println( bb );
System.out.println( i1.compareTo(i2) );
Boolean b1 = new Boolean(true);
Boolean b2 = new Boolean("afda");
System.out.println( b1.compareTo(b2));
System.out.println( i1.equals(i2) );
System.out.println( b1.equals(b2) );
int xx = Integer.parseInt("7894");
System.out.println( xx );
double dd3 = Double.parseDouble("45.123");
boolean flag = Boolean.parseBoolean("qerreqe");
System.out.println( flag );
System.out.println( Integer.toBinaryString(100));
System.out.println( Integer.toOctalString(100));
System.out.println( Integer.toHexString(100));
i1 = Integer.valueOf( 258);
i2 = Integer.valueOf("369");
dd3 = Double.valueOf(3.14);
dd = Double.valueOf("456.789");
}
}
package com.bjpowernode.demo04;
public class Test05 {
public static void main(String[] args) {
int num = 123;
String text = "" + num;
text = String.valueOf(num);
text = Integer.toString(num);
num = Integer.parseInt(text);
Integer i1 = new Integer(num);
i1 = Integer.valueOf(num);
i1 = num;
num = i1.intValue();
num = i1;
text = i1.toString();
i1 = new Integer(text);
i1 = Integer.valueOf(text);
}
}
package com.bjpowernode.demo04;
public class Test06 {
public static void main(String[] args) {
Integer i1 = 456;
Integer i2 = 456;
System.out.println( i1 == i2 );
System.out.println( i1.equals(i2));
i1 = 123;
i2 = 123;
System.out.println( i1 == i2 );
Long gg1 = 99L;
Long gg2 = 99L;
System.out.println( gg1 == gg2 );
}
}