As explained that all the methods are present in the JLabel class. So, this answer is true.

As I explained the reason, all of the functions are defined in the String class. So, this is the correct answer.

As explained all the methods are resent in abstractbutton class, so this answer is correct.

This is the correct choice because there is no method named createFiledBorder() in java. So, this answer is correct.

This the correct choice because there is no method name setPaintedBorder() in JProgressBar class. The correct method is setBorderPainted which Set the progress bar with a border. So, this answer is true.

As I explained that both the options 1 and 2 are correct, so this answer is true.

This is the correct answer. Because the String class objects are immutable i.e once the object of the String class is created its contents cannot be changed. So, we cannot append new characters or string in the old string. So, this is the correct answer.

As I explained both the methods of option 1 and 3 are valid in JScrollPane class. So, this answer is true.

This is the correct choice. There is no method named isCircle() present in JComponenet class in java. So, this is the correct choice.

As I explained all the methods are present in the JTabbedPane class. So, this answer is correct.

As I explained that all the methods given are present in JFormattedTextField class. So, this answer is true.

This is the correct answer, there is no method named isPrinting() in JComponent class in java. So, this answer is correct.

This is the correct answer, there are four constructors of WeakHashMap in java. These are: 1) WeakHashMap(): Constructs a new, empty WeakHashMap with the default initial capacity (16) and load factor (0.75). 2) WeakHashMap(int initialCapacity):-Constructs a new, empty WeakHashMap with the given initial capacity and the default load factor (0.75). 3) WeakHashMap(int initialCapacity, float loadFactor):-Constructs a new, empty WeakHashMap with the given initial capacity and the given load factor. 4) WeakHashMap(Map m): Constructs a new WeakHashMap with the same mappings as the specified map. So, this is the correct answer.

This is the correct choice because setDisplayedMnemonicIndex(int index)Method Provides a hint to the look and feel as to which character in the text should be decorated to represent the mnemonic and this method is present in AbstractButton class. So, this answer is correct.

This is the correct answer because there is no method named setSelectedRolloverIcon(Icon). The correct method name is setRolloverSelectedIcon(Icon), this method lets you specify the rollover icon when the button is selected. This is useful for two-state buttons such as toggle buttons. So, this is a correct choice.