What will happen when you attempt to compile and run the following code?
public class MyField{
String s;
public static void main(String argv[]){
MyField m = new MyField();
m.amethod();
}
void amethod(){
System.out.println(s);
}
}
Debugging is the process of detecting and removing of existing and potential errors (also called as ‘bugs’) in a software code that can cause it to behave unexpectedly or crash. To prevent incorrect operation of a software or system, debugging is used to find and resolve bugs or defects.
Workspace
NA
SHSTTON
307
Solv. Corr.
84
Solv. In. Corr.
391
Attempted
1 M:2 S
Avg. Time
13 / 64
Output of the below partial code.
String[] elements = {"Java","is","platform","independent"};
String result = (elements.length > 0) ? elements[0]:null;
System.out.printf(result);
public class SwitchTest {
public static void main(String argv[]) {
SwitchTest ms=new SwitchTest();
ms.display();
}
public void display() {
int k=10;
switch(k){
case 10:
System.out.println("10");
case 30:
System.out.println("30");
case 20:
System.out.println("20");
default:
System.out.println("40");
}
}
}
class Test {
public static void main(String[ ] args) {
try {
String s = "5.6";
Integer.parseInt(s); // Cause a NumberFormatException
int i = 0;
int y = 2 / i;
System.out.println("Welcome to Java");
} catch (Exception ex) {
System.out.println(ex);
}
}
}
synchronized is the modifier applicable only for methods and blocks, but not for classes and variables.
If multiple threads are trying to operate simultaneously on the same java object, then there may be a chance of Data Inconsistency Problem.
To overcome this problem, we should go for synchronized keyword.
If a method or block is declared as synchronized then at a time only one thread is allowed to execute that method or block on the given object, so that Data Inconsistency problem will be resolved.
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