Working with Arrays of Objects with Java and NetBeans IDE - Passing Arrays of Objects to Methods in Java: Demo
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The two previous sections introduced you to creating arrays of objects in Java. Now, we shall add a new method to the class “MyCalc,” which accepts an array of objects as a parameter.
Now, open your previous application (or download it from my previous articles) and open “MyCalc.java.” Modify your code so that it looks something like the following:
public class MyCalc {
int x=0;
int y=0;
/** Creates a new instance of MyCalc */
public MyCalc() {
}
public void setValues(int m, int n) {
x = m;
y = n;
}
public int getSum() {
int z;
z = x + y;
return z;
}
public int getTotal(MyCalc[] p) {
int s=0;
for(int i=0;i<10;i++) {
s += p[i].getSum();
}
return s;
}
}
Now, go back to the frame “test.java.” Double click on it to open and finally double click on the button to open source view. Within the source view, modify your “buttonActionPerformed” in such a way that it looks like the following:
private void btnShowActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
MyCalc[] ar = new MyCalc[10];
for(int i=0;i<10;i++) {
ar[i] = new MyCalc();
ar[i].setValues(i*10,i*10+1);
}
MyCalc obj1 = new MyCalc();
this.lblMsg.setText("Sum = " + String.valueOf(obj1.getTotal(ar)));
}
The above is simply a demonstration. I leave it to the readers to understand the above.
The entire code for this article is freely available in the form of a zip file. That downloadable solution was developed using NetBeans 4.1 IDE together with Microsoft Windows 2003 Standard Edition. I didn’t really test it in any other version or platform. Please follow the respective platform documentation to get it working. This series is dedicated to the beginners who wanted to work with NetBeans IDE.
Any doubts, bugs, errors, suggestions, feedback etc. are highly appreciated at jag_chat@yahoo.com.
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