e625. making a gridbaglayout fill the container.txt

这里面包含了一百多个JAVA源文件

By default, a gridbag layout arranges its components in the smallest area that satisfies the preferred sizes of the components. If the container is larger than this area, the cluster of components is centered within the container. This example demonstrates how to spread the excess space among all the cells in the gridbag layout. 
It is possible to control exactly how much excess space is distributed among the gridbag layout cells. See e626 Setting the Stretchyness of Rows and Columns in a GridBagLayout Using Layout Weights for more details. 

    GridBagLayout gbl = new GridBagLayout();
    container.setLayout(gbl);
    
    // Add components to container and gbl
    
    // Force the layout of components before calling getLayoutWeights()
    // otherwise the result of getLayoutWeights() is not valid
    gbl.layoutContainer(container);
    
    // Set weights of all columns and rows to 1
    double[][] weights = gbl.getLayoutWeights();
    for (int i=0; i<2; i++) {
        for (int j=0; j<weights[i].length; j++) {
            weights[i][j] = 1;
        }
    }
    gbl.columnWeights = weights[0];
    gbl.rowWeights = weights[1];