I want to replace value of variable array in index [0][2] that the name of coloumn title is "1/y". Previous value is 0.0, I want to replace it with value of calculation result , but when I try to display it, its value is still 0.0, this my code
titleColoumn = new Object[]{"Time (Second)","Medicine", "1/y", "x2", "X/Y", "Y^", "Error"};
//0 1 2 3 4 5 6
allData = new Double[][] {{1.0,1.02,0.0,0.0,0.0,0.0,0.0},
{2.0,0.667,0.0,0.0,0.0,0.0,0.0},
{3.0,0.367,0.0,0.0,0.0,0.0,0.0},
{4.0,0.278,0.0,0.0,0.0,0.0,0.0},
{5.0,0.237,0.0,0.0,0.0,0.0,0.0},
{6.0,0.187,0.0,0.0,0.0,0.0,0.0},
{7.0,0.155,0.0,0.0,0.0,0.0,0.0},
{8.0,0.156,0.0,0.0,0.0,0.0,0.0},
{9.0,0.142,0.0,0.0,0.0,0.0,0.0},
{10.0,0.111,0.0,0.0,0.0,0.0,0.0},
{11.0,0.12,0.0,0.0,0.0,0.0,0.0},
{12.0,0.097,0.0,0.0,0.0,0.0,0.0},
{14.0,0.089,0.0,0.0,0.0,0.0,0.0},
{15.0,0.079,0.0,0.0,0.0,0.0,0.0},
{0.0,0.0,0.0,0.0,0.0,0.0,0.0}};
tableObservation = new DefaultTableModel(allData, titleColoumn);
table.setModel(tableObservation);
int row,coloumn;
//calculation 1/y
row = 0;
coloumn = 1;
int inputRow = 0;
int inputColoumn = 2;
double onePerY;
for(int a=0;a<allData.length;a++){
onePerY = 1/allData[row][coloumn];
//replace value
allData [inputRow][inputColoumn] = onePerY;
inputRow++;
row++;
System.out.println(onePerY);
}
What should I do, to be able to replace it ? all the assistance that you gave, I would appreciate it, thank you
You update array value not TableModel value. Use jTable.getModel().setValueAt() passing inputRow, inputColoumn and appropriate value for them. Your model must be editable. If you use DefaultTableModel it's editable by default.